Several cell biology students are unprepared for a surprise true/false test with 23 questions, and all of their answers are guesses.
Answers
The mean and standard deviation for the number of correct answers for such students is 9 and 2.12 respectively. By guessing, there is a 0.1% or around 0.001 chance of getting at least 16 correct answers. A pupil passing by guessing and earning at least 16 accurate answers would be exceptional because this is an extremely low likelihood.
A. We may apply the binomial distribution formula to determine the mean and standard deviation for the quantity of correct responses.
Since there are 18 questions and it is a true-false test, the likelihood of getting the answer right is 0.5. The mean and standard deviation will now be determined:
Mean (μ) = n × p
Mean (μ) = 18 × 0.5
Mean (μ) = 9
Standard Deviation (σ) = \(\sqrt{n \times p \times (1 - p)}\)
Standard Deviation (σ) = \(\sqrt{18 \times 0.5 \times (1 - 0.5)}\)
Standard Deviation (σ) = √4.5
Standard Deviation (σ) ≈ 2.12
As a result, there were an average of 9 valid responses, and the standard deviation was almost 2.12.
B. We can compute the likelihood that a student will pass by guessing and receiving at least 16 accurate answers to see if this is unusual. Since the test is true or false, there is a 0.5 chance that you will get it right.
We can determine the likelihood of receiving at least 16 correct responses using the binomial distribution formula:
P(X ≥ 16) = P(X = 16) + P(X = 17) + P(X = 18)
P(X = k) = \((^{n}C_{k}) \times p^k \times (1 - p)^{n - k}\)
Plugging in the values, we get:
P(X ≥ 16) = \((^{18}C_{16}) \times 0.5^{16} \times 0.5^{18-16} + (^{18}C_{17}) \times 0.5^{17} \times 0.5^{18-17} + (^{18}C_{18}) \times 0.5^{18} \times 0.5^{18-18}\)
Calculating these probabilities, we find:
P(X ≥ 16) ≈ 0.001
By speculating, there is a roughly 0.001 or 0.1% chance of finding at least 16 accurate answers. It would be unusual for a student to pass by guessing and receiving at least 16 accurate answers because this is an extremely low likelihood.
To learn more about standard deviation link is here
brainly.com/question/13498201
#SPJ4
The complete question is:
Several Psychology students are unprepared for a surprise true/false test with 18 questions, and all of their answers are guesses.
A. Find the mean and standard deviation for the number of correct answers for such students.
B. Would it be unusual for a student to pass by guessing and getting at least 16 correct answers? Why or why not?
Related Questions
1-Look at the equations for photosynthesis and cellular respiration below
Photosynthesis: 6CO2 + 6H2O + light energy → C6H12O6 + 6O2
Cellular Respiration: C6H12O6 + 6O2 → 6CO2 + 6H2O + 38ATP
1a- What products of photosynthesis are used by animals?
In this process they use carbon dioxide and light to make sugars and oxygen.
1b-What products of cellular respiration are used by plants?
cellular respiration is that the plant takes in glucose and oxygen, gives out carbon dioxide and water and releases energy.
2a-If you had seaweed living in an aquarium with water, and you added BTB indicator. What color would you expect to see? Why?
2b-What would this tell you about the level of CO2 ?
2c-How do these results show that seaweed is doing photosynthesis?
3a-If you had a fish living in an aquarium with water, and you added BTB indicator. What color would you expect to see? Why?
3b-what would this tell you about the level of CO2?
people's blood for normal or abnormal carbon dioxide, or CO2, levels to help diagnose certain medical conditions.
3c-How do these results show that the fish is doing cellular respiration?
4-Complete the chart below for photosynthesis and cellular respiration.
What 3 variables affect PS?
What 2 variables affect CR?
5a-If you had an aquatic plant and animal in the same aquarium, and added BTB to the water. What would happen to the level of CO2? (increase, decrease, stay the same) Explain.
Answers
Glucose and oxygen which can be used by the animals while on the other hand, carbondioxide gas is used by the plant.
Products of photosynthesis are glucose and oxygen which can be used by the animals in the process of cellular respiration while on the other hand, carbondioxide gas is the product of cellular respiration which can be used by the plant for making their own food during the process of photosynthesis.
If we had seaweed living in an aquarium with water, and we added BTB indicator, it shows blue color because there is less amount of carbondioxide gas which is responsible for the formation of carbonic acid. The reason behind little amount of carbondioxide gas is the process of photosynthesis done by seaweed.
Lower concentration of carbondioxide provides us information that seaweed is doing photosynthesis. If we had a fish living in an aquarium with water, and we added BTB indicator, we expect yellow colour because carbondioxide gas is added to the water by the respiration process of the fish.
Learn more: https://brainly.com/question/25559170
______occurs so plants can make _________to use for energy
Answers
Answer:
PhotosynthesisGlucosethis is due in 5 min plzzz help
Answers
Answer: 20 g/cm^3
Explanation:
V=Length* Width* Height
V=3*2*1=6 cm
How will humans affect moth populations?
Answers
Human impact may harm moth populations.
How does deforestation impact biodiversity?There are several ways in which humans may affect moth populations. Some possible factors include habitat destruction and fragmentation, pesticide use, light pollution, and climate change.
Habitat destruction and fragmentation can disrupt the natural habitats of moths, which can lead to declines in their populations. Pesticide use can directly harm moths, while light pollution can disrupt their behavior and affect their reproduction. Climate change can also impact moth populations by altering their ranges and changing the timing of their life cycles.
Overall, the specific ways in which humans affect moth populations can vary depending on the species of moth and the local environmental conditions.
Learn more about populations
brainly.com/question/27991860
#SPJ11
Anyone know I’m confused
Answers
Answer:
the correct option is
A. All plant cells have at least one vacuole but only some animal cells have vacuole
Answer: C
Explanation:
All have them, although they vary in size and function
What are the drops of water that form on cool surfaces during the night called?
Example may form on grass or car windshield.
A) Dew
B) Rain
C) stream
D) snow
Answers
Answer:
Dew
Explanation:
Dew is most likely to form at night due to cooler temperatures.
the fact that the embryonic head develops before the body illustrates the ____ principle.
Answers
The fact that the embryonic head develops before the body illustrates the cephalocaudal principle.
According to this principle, during the early stages of development, growth and differentiation occur in a head-to-tail or top-down sequence. This means that the structures and systems in the head region develop and mature before those in the lower body regions.
It is a fundamental pattern observed in the development of various organisms, including humans. The cephalocaudal principle ensures that crucial structures related to sensory perception, coordination, and higher cognitive functions develop first, providing a foundation for subsequent growth and development throughout the body.
This principle helps to shape the overall physical and functional development of organisms during embryogenesis.
To know more about the cephalocaudal principle refer here :
https://brainly.com/question/31029901#
#SPJ11
I need help with this question please and thank you
Answers
For the children of 6 and 7: Individual 8: Affected female, so genotype is HH or Hh. We don't know which one, but we can assume HH for simplicity.
Individual 9: Affected male, so genotype is HH or Hh. We don't know which one, but we can assume HH for simplicity.
Individual 10: Affected female, so genotype is HH or Hh. We don't know which one, but we can assume HH for simplicity.
Individual 11: Healthy female, so genotype is hh.
What are symptoms of Huntington's disease?Huntington's disease is a progressive neurodegenerative disorder that affects the brain and causes a range of physical, cognitive, and emotional symptoms. The following are some of the most common symptoms of Huntington's disease:
Emotional changes: People with Huntington's disease may experience, , irritability, and mood swings.
Decline in motor skills: As the disease progresses, people may have difficulty with balance, coordination, and walking.
Speech problems: Huntington's disease can affect a person's ability to speak clearly and may cause slurred or hesitant speech.
The possible genotypes for each individual are:
Individual 1: HH
Individual 2: hh
Individual 3: hh
Individual 4: HH
Individual 5: hh
Individual 6: HH or Hh
Individual 7: HH or Hh
Individual 8: HH or Hh
Individual 9: HH or Hh
Individual 10: HH or Hh
Individual 11: hh
To know more about chorea, visit:
https://brainly.com/question/20595276
#SPJ1
Which statement correctly describes a chemical reaction?
Reactants come out of a reaction.
Energy is alvays released.
Bonds between atoms break and reform.
O Products go into a reaction.
Answers
Answer:
reactants come out of a reaction
fruit flies gray body color is dominant to black. normal sized wings are dominant to vestigial or short wings. suppose flies that are heterozygous for both genes are test-crossed and the following results are obtained: gray body, normal wings 320 black body, vestigial wings 335 gray body, vestigial wings 30 black body, normal wings 27 based on the above results, how far apart are the body color and wing size genes?
Answers
The result of the test cross for flies that are heterozygous are gray body, normal wings 320 black body, vestigial wings 335 gray body, vestigial wings 30 black body, normal wings 27. Based on the results of the test cross indicate that the body color and wing size genes are close together, as evidenced by the high numbers of phenotypes with combined effects of both.
What Is A Test Cross?In genetics, a test cross is used to determine whether an organism exhibiting a dominant phenotype is homozygous or heterozygous for a particular allele. The result shows that the gene for the body color and wing size is 16 units apart. That is, 16 map units apart. The map unit, also known as the centimorgan, is a unit of genetic distance between genes that corresponds to a 1% recombination frequency. It measures the frequency of crossing over between two genes. So, based on the above results, the body color and wing size genes are 16 map units apart.
Learn more about test cross at https://brainly.com/question/24173210
#SPJ11
How do the types of resources generated by Kentucky compare with the United States?
Answers
A virus is ________ a cell.
A)bigger than
b) the same size as
C)smaller than
d)another word for
Answers
Answer:
smaller than
Explanation:
But they're nothing compared to the giants of the cellular world. ... And viruses are smaller again — they're about a hundredth the size of our cells. So we're about 100,000 times bigger than our cells, a million times bigger than bacteria, and 10 million times bigger than your average virus
Hope this helps <3
Identify the genotype and phenotype of a heterozygous individual.
Answers
ex: (Dh). D- black hair. d- blonde hair
The phenotype will be the one that belongs with the dominant trait (D) so the phenotype would be black hair.
hope that helps
Just before taking an exam, a student eats a donut. The student's body begins to digest the donut through both mechanical and chemical processes. Which is an example of a mechanical process?
A. The student's teeth break apart the donut into little pieces
B. The student's salivary glands release enzymes to break down starches
C. In the stomach, gastric acids break the donut down further into a liquid called chyme
D. In the small intestine, enzymes produced by the gall bladder break the chyme down further
Answers
An example of a mechanical process in this case would be option A, "The student's teeth break apart the donut into little pieces". The teeth break apart the donut, which helps to prepare it for further digestion.
Mechanical processes refer to the physical breakdown of food. In the example of the student eating a donut before taking an exam, the mechanical process would be the student’s teeth breaking apart the donut into smaller pieces. This process involves the movement of the teeth and jaw to cut and chew the donut, thus breaking it down into smaller pieces. Once the donut has been broken into small pieces, the chemical processes begin.
Chemical processes involve the release of enzymes and acids that break down the food further, such as the salivary glands releasing enzymes to break down starches, as well as the stomach releasing gastric acids and the gall bladder producing enzymes in the small intestine. All of these processes work together to help the body break down and digest the food. In conclusion, the mechanical process in the example of the student eating a donut before taking an exam would be the student’s teeth breaking apart the donut into smaller pieces.
Learn more about digestion at : https://brainly.com/question/29028558
#SPJ4
you enter the mouth and find a piece of bread. watch out – the large, muscular _____________________________ which helps mix the food contents with the saliva is about
Answers
You enter the mouth and find a piece of bread. Watch out - the large, muscular tongue which helps mix the food contents with the saliva is about.
The tongue is a muscular organ that is situated in the oral cavity of vertebrates. It is the primary organ of taste, as well as assisting in chewing and swallowing food. Additionally, the tongue performs some critical functions in the mouth, such as mixing food with saliva to moisten it, moving it around in the mouth to help break it down into smaller pieces, and aiding in swallowing. The tongue is essential in the development of speech as it helps form the sounds produced by the mouth and throat.
Learn more about tongue: https://brainly.com/question/28211852
#SPJ11
which subclimates have high annual precipitation
Answers
Answer:
marine west coast, humid continental, humid subtropical
Explanation:
this should be right.
Answer:
Precipitation levels are low, and the average temperatures are high.
Explanation:
the cortical magnification factor occurs in humans because a. a small area in the peripheral retina accounts for a large area on the cortex. b. the small area of the fovea accounts for a large area on the cortex. c. the area at the optic disk accounts for a large area on the cortex. d. the lens accommodates so that the image is magnified on the retina.
Answers
The cortical magnification factor occurs in humans because, a small area in the peripheral retina accounts for a large area on the cortex. The answer to this question is option A.
The cortical magnification factor is the phenomenon where small areas in the peripheral retina account for large areas on the cortex. This means that certain areas of the retina, such as the fovea, are more sensitive to light and can capture finer details. As a result, these small areas are given more processing power in the brain, resulting in a larger representation on the cortex.The other options provided in the question are not correct. The small area of the fovea does account for a large area on the cortex, but this is not the reason for the cortical magnification factor.
The area at the optic disk is not involved in cortical magnification, and the lens accommodates to adjust focus on the retina, not to magnify the image. The cortical magnification factor occurs in humans because the small area of the fovea accounts for a large area on the cortex. This increased processing results in a larger cortical representation for the fovea, leading to the cortical magnification factor.
For more such questions on cortex , Visit:
https://brainly.com/question/1191477
#SPJ11
CAN SOMEONE PLSSS HELP ME THIS IS DUE IN ONE HOUR?
Water (H20) and hydrogen pereunde (H2021 both consists of hydrogen and oxygen atoms. Explain why they have different chemical and physical properties?
Answers
Answer:
Even though they are both made up of hydrogen and oxygen atoms, water and hydrogen peroxide habe different properties because they are made up of different combinations of the elements' atoms.
Explanation:
Compose an essay describing the biome/ecosystem. Include the following information:
Describe the Biome/temperature and precipitation patterns, abiotic and biotic factors, etc.
One keystone species
Feeding relationships / Food web
producers
primary consumers
secondary consumers
tertiary consumers
decomposers
Energy transfer / Energy pyramid
Niche for one of the organisms
5 interactions
Density-dependent factor and impact
Density independent factor and impact
Effects of a forest fire / secondary succession (changes and timeline)
Human impact on the ecosystem (both positive and negative)
I will give Brainliest
Answers
Answer:
Terrestrial ecosystems are known for their diversity; they are grouped into large categories called biomes. Grouping these ecosystems into just a few biome categories obscures the great diversity of the individual ecosystems within them. For example, there is great variation in desert vegetation: the saguaro cacti and other plant life in the Sonoran Desert, in the United States, are relatively abundant compared to the desolate rocky desert of Boa Vista, an island off the coast of Western Africa
In eukaryotes, what would happen if the tata box became mutated to tgta?.
Answers
Answer:
Here is the answer
Explanation:
The TGTA mutation in the TATA-box completely inactivated the promoter, making component one non-functional. This non-functional module became transcriptionally active in the presence of the component two that expressed TBPm3.
What is the evolution of humans
Answers
Answer:
Human evolution is the lengthy process of change by which people originated from apelike ancestors. Scientific evidence shows that the physical and behavioral traits shared by all people originated from apelike ancestors and evolved over a period of approximately six million years
Explanation:
Answer:
Human evolution is the lengthy process of change by which people originated from apelike ancestors.
Explanation:
organizing influences of androgens on the nervous system occur when
Answers
Moment-to-moment fluctuations in sex-linked hormones influence brain and behavioural responses
Androgen receptors have interaction with other proteins within the nucleus, ensuing in up- or down-law of precise gene transcription. Up-law or activation of transcription effects in increased synthesis of messenger RNA, which, in turn, is translated with the aid of ribosomes to produce precise proteins.
Ante-natal publicity to extraordinary hormone environments leads to changes in human behaviours that display intercourse differences. those encompass youth play, sexual orientation, gender identity, and persona traits, which include empathy and aggression.
The actual secretion of androgens by way of these cells is controlled by using luteinizing hormone (LH) from the pituitary gland.
Androgens like testosterone are intercourse hormones. Androgens help people input puberty and mature physically. women with excessive androgen stages can also expand acne, facial hair and other troubles. males with too little androgen may additionally have low sex drives and broaden breasts (gynecomastia).
To know more about hormones click here
https://brainly.com/question/1561781
#SPJ4
Why did plantation slavery replace indentured servitude as the major economic anchor of the atlantic system?
Answers
Plantation slavery replaced indentured servitude as the major economic anchor of the Atlantic system for several reasons. One key factor was the labor needs of the growing plantation economies in the Americas, particularly in the Caribbean and southern colonies. Indentured servitude, where individuals worked for a set period in exchange for passage to the New World, became less viable as a labor source due to declining numbers of willing participants and increasing wages.
In contrast, plantation slavery provided a consistent and long-term labor force. Enslaved Africans were captured and forcibly transported to the Americas, where they were subjected to harsh conditions and forced labor on plantations. The Atlantic slave trade provided a constant supply of enslaved laborers, allowing plantation economies to flourish.
Additionally, the profitability of plantation crops such as sugar, tobacco, and cotton played a significant role in the shift towards slavery. These crops required large-scale production and intensive labor, which could be efficiently provided by enslaved Africans. The availability of cheap labor through slavery enabled plantation owners to maximize their profits and expand their operations.
Furthermore, the legal and social systems in the Americas supported the institution of slavery. Laws and regulations were developed to maintain the control and exploitation of enslaved individuals, reinforcing the economic dominance of slavery. Slavery became deeply ingrained in the social fabric of the plantation colonies, with racial ideologies and discriminatory practices further entrenching its role in the Atlantic system.
Overall, the combination of labor demands, profitability of plantation crops, legal support, and social acceptance contributed to the replacement of indentured servitude with plantation slavery as the major economic anchor of the Atlantic system.
to know more about Plantation slavery visit :
https://brainly.com/question/589767
#SPJ11
What does the prefix pseudo mean in the word pseudoscience?
false
subjective
systematic
factual
Answers
Hii!!! I believe the answer is A. False. (:
what is influenced only by heredity and not environmental factors? Can someone plz help me!!!
a.
obesity
b.
diabetes
c.
heart disease
d.
muscular dystrophy
Answers
Answer:
B
Explanation:
Obesity is cause by accumulating fat, Heart disease is not hereditary, and muscular dystrophy an be caused by stress according to the BBC
Obesity can be caused by low metabolism, bad diet, and lack of exercise. There are two kinds of diabetes. It doesn’t specify which type though. Type 1 diabetes is hereditary, but type two can be caused by bad diet and lack of exercise. Heart disease can be caused by many things, from stress to (once again) not taking care of your body.
Tim's manager has asked him to outsource several customers service jobs at the company where he works. Where will Tim find these outsourced people to fill the customer service positions?
(A) From other countries.
(B) Within the company where Tim works.
(C) At the competing company across the street.
(D) In his friends and family circle.
Answers
Tim is going to have to find the people that would fill in the positions from other countries.
What is meant by outsourcing?Outsourcing is a business practice in which a company hires another company or individuals to perform tasks, services, or functions that are typically done in-house. The idea behind outsourcing is to reduce costs, increase efficiency, or tap into specialized expertise. Outsourced tasks may include customer service, manufacturing, accounting, IT support, or any other function that is not considered a core competency of the company.
Outsourcing can take place within a country or across international borders. The term "offshoring" is used specifically when outsourcing is done to a foreign country. The use of outsourcing has become increasingly common in recent years as companies look for ways to remain competitive in a rapidly changing global market.
Read more on outsourcing here:https://brainly.com/question/4456416
#SPJ1
Tim's manager has asked him to outsource several customers service jobs at the company where he works therefore he will find these outsourced people to fill the customer service positions within the company where Tim works and is therefore denoted as option B.
What is Outsourcing?This is referred to as a business practice in which a company hires a third party to perform tasks, handle operations or provide services for the company.
Since he was told to outsource several customers service jobs at the company where he works the he just means him being in charge of handling their operations within the company where he works.
Read more about Outsourcing here https://brainly.com/question/12101789
#SPJ1
Blood type is a type of gene where both alleles can be expressed. Which statement best explains a person with AB blood type.
Answers
Answer:There is a codominant relationship between alleles
Explanation:
in the tree of life, fungi are most closely related to: group of answer choices archaea bacteria viruses plants animals
Answers
In the tree of life, fungi are most closely related to animals.
1. Analyze the group of answer choices: archaea, bacteria, viruses, plants, and animals.
2. Understand that fungi, like the other groups, are eukaryotic organisms.
3. Recognize that archaea and bacteria are prokaryotic, while viruses are not even considered living organisms, so they can be eliminated as options.
4. Compare fungi to the remaining eukaryotic groups, plants and animals.
5. Observe that fungi and animals share more common characteristics, such as heterotrophy (obtaining nutrients from external sources) and the presence of chitin in their cell walls.
To know more about fungi, visit here :
brainly.com/question/1261179
#SPJ11
In order for species to evolve, there must be
A. all are correct
B. overpopulation/overproduction
C. variation
D. adaptations
Answers
Answer:
D. adaptations
Explanation:
( it might be wrong pls dont report me just let me kno y its wrong )
Answer:
A. All are correct
Explanation:
Populations evolve, not individuals. ... A single organism is never typical of an entire population unless there is no variation within that population. Individual organisms do not evolve, they retain the same genes throughout their life.
the process of oxygen moving from the atmosphere into the alveoli is called?
Answers
This exchange of oxygen and carbon dioxide is referred to as respiration. With each breath, every few seconds, a large portion of the millions of alveoli are filled with air.
This diffusion of oxygen from the alveoli to the blood is made possible by the small capillaries that border the alveolar walls. After oxygen enters the bloodstream, it is absorbed by haemoglobin in red blood cells. The heart, which receives the previously oxygenated blood, then pumps this blood through the arteries to the body's oxygen-starved tissues. The tiny capillaries in the body tissues allow oxygen to be released from haemoglobin and enter cells.
Learn more about oxygen here:
https://brainly.com/question/29988383
#SPJ4