A variety of stores offer loyalty programs. Participating shoppers swipe a bar-coded tag at the register when checking out and receive discounts on certain purchases. A typical Saturday morning shopper who does not participate in this program spends $120 on her or his order. In a sample of 80 shoppers participating in the loyalty program, each shopper spent $130 on average during a recent Saturday, with standard deviation $40. Is this statistical proof that the shoppers participating in the loyalty program spent more on average than typical shoppers?
Answers
Answer:
\(t=\frac{130-120}{\frac{40}{\sqrt{80}}}=2.236\)
Now we can find the degrees of freedom:
\(df=n-1=80-1=79\)
Now we can calculate the p value with the alternative hypothesis using the following probability:
\(p_v =P(t_{(79)}>2.236)=0.0141\)
Using a significance level of 0.01 or 1% we have enough evidence to FAIL to reject the null hypothesis and we can conclude that shoppers participating in the loyalty program NOT spent more on average than typical shopper at this significance level assumed
Step-by-step explanation:
Information given
\(\bar X=130\) represent the sample mean
\(s=40\) represent the sample standard deviation
\(n=80\) sample size
\(\mu_o =120\) represent the value to verify
t would represent the statistic
\(p_v\) represent the p value
System of hypothesis
We want to verify if shoppers participating in the loyalty program spent more on average than typical shoppers (120) , the system of hypothesis would be:
Null hypothesis:\(\mu \leq 120\)
Alternative hypothesis:\(\mu > 120\)
The statistic for this case is given by:
\(t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}\) (1)
Replacing the info given we got:
\(t=\frac{130-120}{\frac{40}{\sqrt{80}}}=2.236\)
Now we can find the degrees of freedom:
\(df=n-1=80-1=79\)
Now we can calculate the p value with the alternative hypothesis using the following probability:
\(p_v =P(t_{(79)}>2.236)=0.0141\)
Using a significance level of 0.01 or 1% we have enough evidence to FAIL to reject the null hypothesis and we can conclude that shoppers participating in the loyalty program NOT spent more on average than typical shopper at this significance level assumed
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without using a calculator
cos² 43° - sin² 74° + cos² 47 - Sin16°
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Answer:
100
Step-by-step explanation:
because if you add it all up you will find the sum
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Step-by-step explanation:
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Inferential statistics
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Answer:
Inferential statistics use measurements from the sample of subjects in the experiment to compare the treatment groups and make generalizations about the larger population of subjects. There are many types of inferential statistics and each is appropriate for a specific research design and sample characteristics
Step-by-step explanation:
hope this helps (﹡ˆ﹀ˆ﹡)♡
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Answer:
It's C.7
Step-by-step explanation:
Use the foil method
2. Solve: 10 - 5m = 25
7
3
о
-3
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Answers
Answer:
-3
Step-by-step explanation:
subtract 10 to the 25 so that cancels out the 10, you are left with -5m=15, then you divide the -5m by -5 to cancel it out on both sides. that leaves you with m by itself and once you do the division of 15 by -5 the result is -3
A common aspect ratio for computer screens today is width : height = 16 : 9. The advertised size of a screen is given by the measure of its diagonal. Measure the width, height, and diagonal of at least three screens (computers, tablets, phones) in your home. Are they similar? How do you know? Are any of your screens congruent? If so, what postulates prove it? List your measurements and describe your findings carefully.
Please follow these guidelines for your discussion posts:
Write at least 150–300 words.
Answers
A common aspect ratio for computer screens is 16:9, which means that for every 16 units of width, there are 9 units of height. This aspect ratio is also used on many televisions and mobile devices.
How to explain the ratio?If a screen has an aspect ratio of 16:9, the width and height will be similar on all screens with this aspect ratio. However, the diagonal measurement will vary depending on the size of the screen.
Congruent screens are two or more screens that have the same dimensions. Two screens are congruent if and only if corresponding sides are equal and corresponding angles are equal. This can be proven using the postulates of congruence, such as the SSS (Side-Side-Side) postulate or the SAS (Side-Angle-Side) postulate.
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in a lottery, players must match five numbers plus a bonus number. five white balls are chosen from 59 white balls numbered from 1 to 59, and one red ball (the bonus number) is chosen from 35 red balls numbered 1 to 5. how many different results are possible?
Answers
Complete the expression so that it is equivalent to 2 (x+6)
Answers
The complete expression is (2 × x) + (2 × 6). This is an equivalent expression to the given expression.
What is an expression?
A number, a variable, or a combination of numbers, variables, and operation symbols make up an expression. Two expressions joined by an equal sign form an equation.
Given expression is
2 (x+6)
Distributive property: The same outcome is obtained by multiplying the sum of two or more addends by a number as it is by multiplying each addend by the number separately and combining the resulting products.
The mathematical representation is a(b+c) = ab + ac.
Apply the Distributive property in the given expression:
(2×x) + (2×6)
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Determine the validity of the converse and give a counterexample if the converse is not valid.
If it is sunny, then it is 80° Fahrenheit. The converse is valid.
If it is 80° Fahrenheit, then it is sunny. The converse is valid.
If it is not sunny, then it is not 80° Fahrenheit. The converse is invalid; a counterexample is a day that is not 80° Fahrenheit and not sunny.
If it is 80° Fahrenheit, then it is sunny; The converse is invalid; a counterexample is a day that is 80° and cloudy.
Answers
Your analysis is correct. Here's a summary:
If it is sunny, then it is 80° Fahrenheit. (Original statement)
Converse: If it is 80° Fahrenheit, then it is sunny. (Valid)
If it is 80° Fahrenheit, then it is sunny. (Original statement)
Converse: If it is sunny, then it is 80° Fahrenheit. (Valid)
If it is not sunny, then it is not 80° Fahrenheit. (Original statement)
Converse: If it is not 80° Fahrenheit, then it is not sunny. (Invalid)
Counterexample: A day that is not 80° Fahrenheit and not sunny (e.g., 70° and cloudy).
If it is 80° Fahrenheit, then it is sunny. (Original statement)
Converse: If it is sunny, then it is 80° Fahrenheit. (Invalid)
Counterexample: A day that is 80° Fahrenheit and cloudy.
In cases 1 and 2, the original statements and their converses are valid because the relationship between "sunny" and "80° Fahrenheit" holds in both directions. However, in cases 3 and 4, the converses are invalid because there are counterexamples where the second part of the statement (either "not 80° Fahrenheit" or "cloudy") does not necessarily imply the first part ("not sunny" or "80° Fahrenheit").
Guys please help this is making my brain hurt I will give brainliest btw
Answers
Answer:
in order from the top down
2,5,1,4,5
Look for factors that will help you determine what type of economy exists in Country A.
Based on the clues in this passage, what type of economy does Country A have?
developed
developing
transitioning
command
Answers
developing:
a low GDP
an economy based on agriculture
Based on the limited information provided, it is not possible to definitively determine the type of economy in Country A. More specific details and factors would be necessary to make a conclusive determination.
Job A: $15.00 per hour (40 hours a week)Job B: $1,375 semi-monthly
a. Which job pays more?
b. How much more?
Answers
Answer:
Step-by-step explanation:
JOB A: 40*15=600 PER WEEK
600*4=2400 PER MONTH
JOB B; 1375*2=2750 PER MONTH
JOB A PAYS MORE 2750-2400=350.00
WITH 350.00 DOLLARS
What is the formula you would use to find the area of a triangle? Explain how that formula is related to the area formula for a rectangle.
Answers
Answer:
1/2 b*h
Step-by-step explanation:
for rectangle it is b*h means double of that traingle
what is .09 as a fraction?
Answers
Answer:
9/100
Step-by-step explanation:
When we change .09 to a fraction, we can put the 9 over 100 because the 9 is in the hundredths place. We get 9/100. We can’t simplify it so it stays like that.
I hope this helped and please mark me as brainliest!
What is the formula forfinding the area of a circle using its radius or diameter.
Answers
Answer:
The formula for finding the area of a circle using its radius is:
The formula for finding the area of a circle using its radius is:A = πr²
The formula for finding the area of a circle using its radius is:A = πr²where A is the area of the circle and r is its radius.
The formula for finding the area of a circle using its radius is:A = πr²where A is the area of the circle and r is its radius.The formula for finding the area of a circle using its diameter is:
The formula for finding the area of a circle using its radius is:A = πr²where A is the area of the circle and r is its radius.The formula for finding the area of a circle using its diameter is:A = (π/4)d²
The formula for finding the area of a circle using its radius is:A = πr²where A is the area of the circle and r is its radius.The formula for finding the area of a circle using its diameter is:A = (π/4)d²where A is the area of the circle and d is its diameter.
The formula for finding the area of a circle using its radius is:A = πr²where A is the area of the circle and r is its radius.The formula for finding the area of a circle using its diameter is:A = (π/4)d²where A is the area of the circle and d is its diameter.Note that π (pi) is a mathematical constant that represents the ratio of the circumference of a circle to its diameter and is approximately equal to 3.14
Step-by-step explanation:
Hope it Helps
The formula for finding the area of a circle using its radius is π * r².
The formula for finding the area of a circle using its diameter is (π/4) * d².
The formula for finding the area of a circle using its radius is:
A = π * r²
where:
A represents the area of the circle,
π (pi) is a mathematical constant approximately equal to 3.14159, and
r represents the radius of the circle.
If you have the diameter of the circle instead of the radius, you can use the following formula:
A = (π/4) * d²
where:
A represents the area of the circle,
π (pi) is a mathematical constant approximately equal to 3.14159, and
d is the diameter of the circle.
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Try to find this answer! Thank you!
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Y (4)
+4y ′′
+4y=0 A general solution with x as the independent variable is y(x)=
Answers
Answer:
Step-by-step explanation:
We can use the method of undetermined coefficients to solve this differential equation. First, we will need to find the solution to the homogeneous equation and the particular solution to the non-homogeneous equation.
For the homogeneous equation, we will use the form y"+ky=0, where k is a constant. We can find the solutions to this equation by letting y=e^mx,
y"=m^2e^mx -> (m^2)e^mx+k*e^mx=0, therefore (m^2+k)e^mx=0
(m^2+k) should equal 0 for the equation to have a non-trivial solution. Therefore, m=±i√(k), and the general solution to the homogenous equation is y=A*e^i√(k)x+Be^-i√(k)*x.
Now, we need to find the particular solution to the non-homogeneous equation. We can use the method of undetermined coefficients to find the particular solution. We will let yp=a0+a1x+a2x^2+.... As the derivative of a sum of functions is the sum of the derivatives, we get
yp″=a1+2a2x....yp‴=2a2+3a3x+....
Substituting the general solution into the non-homogeneous equation, we get
a0+a1x+a2x^2+...+2a2x+3a3x^2+...=Y(4)
So, the coefficient of each term in the expansion of the left hand side should equal the coefficient of each term in the expansion of the right hand side. Since there is only one term on the right hand side, we get the recurrence relation:
a(n+1)=Y(n-2)/n^2
From this relation, we can find all the coefficients in the expansion for the particular solution. Using this particular solution, we can find the total solution to the differential equation as the sum of the homogeneous solution and the particular solution.
GOD PLEASE HELP ME!!!!!!ITS DUE IN 10 MINUTES
Answers
Savanna spent a total of $116 on 30 plates, 40 cups, and 4 packages of napkins. Matthew spent $1000 on 250 plates, 300 cups, and 50 packages of napkins. Justin spent $189 on 55 plates, 55 cups, and 6 packages of napkins.
Which system of linear equations could be used to determine the price of each type of party supply?
Answers
Answer: rate this 5 stars or your gay
Step-by-step explanation:
Just do it
How many miles did Candice bike on her route ?
Answers
Answer:
what are your options
Step-by-step explanation:
1960 were polled. 279 of them preferred Rock and Roll. What is the % of these students?
Answers
Answer:
14.2% students
Step-by-step explanation:
279 / 1960 = 0.142
0.142 x 100% = 14.2 %
What is the domain of the function y=3 sqrt x?
Answers
Answer:
Step-by-step explanation:
y=3√x
domain : all real values≥0
Maggie writes the equations below to find the unknown number in 14 x 2 to x 3 equals which pair of the equation shows another way that Maggie could find a unknown number
Answers
Multiplication has the associative property, this means that you can compute 14 x 2 x 3, computing first 14 x 2 = 28, and then 28 x 3 = 84; or you can compute first 2 x 3 = 6, and then 14 x 6 = 84 (second option)
Solve for x x= [ ]* pls help
![Solve for x x= [ ]* pls help](https://i5t5.c14.e2-1.dev/h-images-qa/contents/attachments/HWnqG1VHOWReI5DSkrXgqXq0UY96aNDE.png)
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What is an equation of the line that passes through the point (8, 2) and is
parallel to the line 5x – 4y = 36?
Answers
Step-by-step explanation:
5x - 4y = 36
4y = 5x - 36
y = 1.25x - 9
Since this line has a slope of 1.25, the parallel line will also have a slope of 1.25.
=> y = 1.25x + c
When x = 8, y = 2.
=> (2) = 1.25(8) + c
=> 2 = 10 + c, c = -8
Hence the line equation is y = 1.25x - 8.
Answer:
\(5x - 4y = 36 \\ 4y = 5x - 36 \\ y = \frac{5}{4} x - 9\)
When the point is (8,2) and slope is 5/4
\(y = mx + c \\ 2 = \frac{5}{4} \times 8 + c \\ 2 = 10 + c \\ \boxed{c = - 8} \\ \)
Putting the value of c=-8, we get
\(y = \frac{5}{4} x - 8 \\ 4y = 5x - 32 \\ \boxed{5x - 4y = 32} \: is \: the \: required \: equation.\)
Help!!!! Please
Asap
Answers
Answer:
events at A and B are independent because P(A)(B)≠P(A)
Please help me in confused
Answers
Answer:
20\(c^{6}\)
Step-by-step explanation:
using the rule of exponents
\(a^{m}\) × \(a^{n}\) = \(a^{(m+n)}\)
given
(- 4c³)(- 5c³) ← remove parenthesis
= - 4 × c³ × - 5 × c³
= - 4 × - 5 × c³ × c³
= 20 × \(c^{(3+3)}\)
= 20\(c^{6}\)
Need help with my geometry homework grade due to
Answers
The surface area of the base ball to the nearest whole number is 26 in²
What is surface area of a sphere?A sphere is defined as the set of all points in three-dimensional Euclidean space that are located at a distance.
The area occupied by a three-dimensional object by its outer surface is called the surface area.
The surface area of a sphere is expressed as;
SA = 4πr²
where r is the radius and it's calculated as;
C = 2πr
9 = 2πr
r = 4.5/π =
SA = 4 π × (4.5/π)²
SA = 81/π
SA = 26 in²( nearest whole number)
Therefore the surface area of the sphere is 26 in²
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A red purse contains $7, and a black purse contains $10. Each package contains X red purses and Y black purses. If there are N packages (N ≥ 2) and the total value of them is $2021 and if each of X, Y, and N are positive integers, what is X+Y+N?
Answers
If each of X, Y, and N are positive integers, then the value of X+Y+N is 212.1
What are system of inequalities?A collection of inequalities for which we consider common solution for all inequalities is called a system of inequalities.
WE are given that A red purse contains $7, and a black purse contains $10. Each package contains X red purses and Y black purses.
X = 7
Y = 10
If there are N packages (N ≥ 2) and the total value of them is $2021
X + Y = One packages
N packages = N(X + Y ) = 10 N
if each of X, Y, and N are positive integers, then;
10 N = 2021
N = 2021/10
N = 202.1
Therefore, X+Y+N = 10 + 202.1 = 212.1
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21) Kinzang is 1.49 m tall. He was 0.53 m at birth. How much did he grow?
Answers
Kinzang grew 0.96 meters.
We have,
To find how much Kinzang grew, we need to subtract his height at birth from his current height:
Height Kinzang grew = Current height - Height at birth
Height Kinzang grew = 1.49 m - 0.53 m = 0.96 m
Therefore,
Kinzang grew 0.96 meters.
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