A large school district notices that about 26% of its sophomore students fail Algebra I. An online education supplier suggests the district try its new technology software, which is designed to improve Algebra 1 skills and, thus, decrease the number of students who fail the course. The new technology software is quite expensive, so the company offers a free, one-year trial period to determine whether the Algebra 1 pass rate improves. If it works, the district will pay for continued use of the software. What would happen if the school district makes a Type I error
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Answer:
In the case of a Type I error, the null hypothesis would be wrongly rejected and the school district will conclude that the new technology is effective when it is not.
They will start to pay for the software when in fact it does not improve Algebra 1 skills.
Step-by-step explanation:
A Type I error happens when a true null hypothesis is rejected.
The probability of a Type I error is equal to the significance level, as it is the probabilty of getting an sample result with low probability but only due to chance, as the null hypothesis is in fact true.
In this scenario, the null hypothesis would represent the claim that the new technology does not make significant improvement.
In the case of a Type I error, this null hypothesis would be wrongly rejected and the school district will conclude that the new technology is effective when it is not.
They will start to pay for the software when in fact it does not improve Algebra 1 skills.
Related Questions
I need help with math ngl
Answers
Answer:
Oldest to newest:
10^-35, 10 ^-10, 0
Step-by-step explanation:
Scientific notation
To figure out the power of 10 think "how many places do I move the decimal point?"
When the number is 10 or greater the decimal point moves to the left, and the power of 10 is positive.
When the number is smaller than 1 the decimal point moves to the right, so the power of 10 is negative.
Find the value of each variable in the parallelogram.
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Answer:
x = 9 and y = 15
Step-by-step explanation:
this is the answer because each side is equivalent to the parallel line so y would be whatever is across from it
Answer:
y=15
x=9
Step-by-step explanation:
they are parallel and equal to the opposite sides
Choose the equation for the graph.
A. y = -x + 2 + 5,
B. y = -x - 2 + 5
C. y = -x - 5 - 2
D. y = x + 5|2
E. y = x
2 + 5
Enter
Help
Skip
Answers
Answer:
B
the vertex (h,k) = (2,5)
Step-by-step explanation:
we can get the vertex from the equation as (2,5)
as well as the graph being in this shape means it is –|x|
pLeAsE HuRrY Lol what’s 1+1=
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There are 2 answers to this question
First Answer:
1+1=2
Second Answer:
Window
Explanation:
1 goes on the top
1 goes on the bottom
The first - of the = goes on the side
The second - of the = goes on the other side
The + sign goes in the middle
Heres a picture example:
I hope this helps you have a good day/night/afternoon
3. Colin is painting his basement floor. The dimensions are shown on the diagram below:
If one can of paint will cover 3.5 m², and each can costs $15.25, what is the total cost including 13% HST.
2.3 m
2.5 m
32m
1.8 m
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The total cost of painting his basement floor is $51.70.
How to calculate total cost ?To find the total cost of the paint including HST, we first need to calculate the total area of the basement floor that needs to be painted. We can do this by multiplying the length by the width:
Area of basement floor = length x width
Area of basement floor = 2.5 m x 2.3 m + 1.8 m x 2.3 m
Area of basement floor = 5.75 m² + 4.14 m²
Area of basement floor = 9.89 m²
Now, we can calculate the number of cans of paint needed:
Number of cans = Area of basement floor / Area covered by each can
Number of cans = 9.89 m² / 3.5 m²
Number of cans = 2.8257
Number of cans = 3
The total cost of the paint without HST would be:
Total cost = Number of cans x Cost per can
Total cost = 3 x $15.25
Total cost = $45.75
To calculate the HST, we need to multiply the total cost by the HST rate (13% or 0.13):
HST = Total cost x HST rate
HST = $45.75 x 0.13
HST = $5.95 (rounded to two decimal places)
Finally, we can find the total cost including HST by adding the total cost and the HST:
Total cost including HST = Total cost + HST
Total cost including HST = $45.75 + $5.95
Total cost including HST = $51.70
Therefore, the total cost of the paint including 13% HST is $51.70.
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Find the value of x. Round your answer to the nearest tenth.
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Answer:
19/21=0.9
I hope this is good enough:
12a = 4 what is a HELP ME PLZ
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3x4 is 12
Hope this helps!
Answer:
a = 1/3
Step-by-step explanation:
a = 4/12
4/12 simplifies to 1/3
PLS HELP URGENT
In triangle PQR.
Sis the point on PR such that angle RSQ = 90°
RQ = 14 cm
RS -- 10 cm
SP - 5 cm
Work out the length of PQ.
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PQ=11
PS^2+SR^2=QR^2
PS^2+PS^2=PQ^2
9514 1404 393
Answer:
11 cm
Step-by-step explanation:
The law of cosines can be helpful here. In order to find PQ, we must know the cosine of the angle R. Fortunately, SOH CAH TOA reminds us it is ...
Cos = Adjacent/Hypotenuse
cos(R) = 10/14 = 5/7
__
The law of cosines gives us the relation ...
PQ^2 = PR^2 +QR^2 -2·PR·QR·cos(R)
PQ^2 = 15^2 +14^2 -2(15)(14)(5/7) = 121
PQ = √121 = 11
The length of PQ is 11 cm.
_____
Alternate solution
This can be solved using the Pythagorean theorem twice.
QS^2 = QR^2 -SR^2 = 14^2 -10^2 = 96
PQ^2 = PS^2 +QS^2 = 5^2 +96 = 121
PQ = √121 = 11
8 grade math part 1 help me
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EXPLANATION: 360-180=180
Same set up as the problem to the left. Fill in the blanks. 39 + 25
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Prettt simple
4% of 50
Percent of a quantity
M
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Answer:
4% of 50 is 2
Step-by-step explanation:
how maany whole numbers are there between 1 and 50 that are divisible by 2
Answers
Answer:
24
Step-by-step explanation:
2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48
Study these equations:
f(x) = 2x – 4
g(x) = 3x + 1
What is h(x) = f(x)g(x)?
h(x) = 6x2 – 10x – 4
h(x) = 6x2 – 12x – 4
h(x) = 6x2 + 2x – 4
h(x) = 6x2 + 14x + 4
Answers
Answer:
6x2-10x-4
Step-by-step explanation:
hx=(2x-4)(3x+1)
hx=2x(3x+1)-4(3x+1)
hx=6x2+2x-12x-4
hx=6x2-10x-4
4. Which situation could be represented by the equation 10.75 = 5.5 n?
Ricardo ran 5.5 miles.
He ran each mile in 10.75 minutes.
What is n, the total number of minutes it took Ricardo to run 5.5
miles?
Ricardo ran a totalof 10.75 miles on Monday.
He ran 5.5 miles in the morning and the rest of the miles in the
evening.
What is n, the number of miles Ricardo ran in the evening?
Ricardo ran a total of 10.75 miles.
He ran 5.5 miles each hour.
What is n, the number of hours Ricardo ran?
Ricardo ran 10.75 hours one week and 5.5 hours the next week.
What is n, the total number of hours Ricardo ran during these
weeks?
Answers
Answer:
Ricardo ran a total of 10.75 miles on Monday.
\(n =1.95\)
Step-by-step explanation:
Given
\(10.75 = 5.5n\)
Required
Which situation represents the equation and solve for n
The options show the relationship between distance, time and speed.
This is calculated as:
\(Distance = Speed * Time\)
By comparison:
\(Distance = 10.75\)
\(Speed = 5.5\)
\(Time = n\)
So, we can say that:
He ran 10.75 miles (option D)
Solving for n:
Make n the subject in \(10.75 = 5.5n\)
\(\frac{10.75}{5.5} = n\)
\(n = \frac{10.75}{5.5}\)
\(n =1.95\)
In a survey of 259 professional athletes, it was found that 110 of them owned a convertible, 91 of
them owned a giant screen TV, and 120 owned a sporting goods store. 15 owned a convertible and a
store, 43 owned a TV and a store, and 44 owned a covertible and a TV. 9 owned all three items.
1. How many athletes did not own any of the three items?
2. How many owned a covertible and a TV, but not a store?
3. How many athletes owned a convertible or a TV?
4. How many athletes owned exactly one type of item in the survey?
5. How many athletes owned at least one type of item in the survey?
6. How many owned a TV or a store, but not a convertible?
Answers
1. Number of athletes did not own any of the three items = 259 - 228
= 31.
2. Number of athletes own a convertible and a TV but not a store = 44 - 9
= 35.
3. Number of athletes own a convertible or a TV = 110 + 91 - 44
= 157.
4. Number of athletes owned exactly one type of item = 60 + 13 + 71 = 144.
5. Number of athletes owned at least one type of item = 259 - 31
= 228
6. Number of athletes own a TV or a store, but not a convertible = 13 + 34 +71
= 118.
The number of athletes did not own any of the three items need to subtract the number of athletes who own at least one item from the total number of athletes surveyed.
Total number of athletes surveyed = 259
Number of athletes own at least one item = 110 + 91 + 120 - 15 - 43 - 44 + 9 = 228
Number of athletes who did not own any of the three items = 259 - 228 = 31.
The number of athletes who owned a convertible and a TV but not a store need to subtract the number of athletes who own all three items from the number of athletes who own a convertible and a TV.
Number of athletes who own a convertible and a TV = 44
Number of athletes who own all three items = 9
Number of athletes who own a convertible and a TV but not a store = 44 - 9 = 35
The number of athletes who owned a convertible, or a TV need to add the number of athletes who own a convertible to the number of athletes who own a TV and then subtract the number of athletes own both a convertible and a TV.
Number of athletes who own a convertible or a TV = 110 + 91 - 44
= 157.
The number of athletes owned exactly one type of item need to add up the number of athletes who own a convertible only the number of athletes own a TV only and the number of athletes who own a store only.
Number of athletes own a convertible only = 110 - 15 - 9 = 86
Number of athletes own a TV only = 91 - 44 - 9 = 38
Number of athletes own a store only = 120 - 15 - 43 - 9 = 53
Number of athletes owned exactly one type of item = 60 + 13 + 71 = 144.
The number of athletes who owned at least one type of item can use the result from part (1).
Number of athletes who owned at least one type of item = 259 - 31
= 228
The number of athletes who owned a TV or a store but not a convertible need to subtract the number of athletes who own all three items, and the number of athletes own a convertible and a TV from the number of athletes own a TV or a store.
Number of athletes own a TV or a store = 91 + 120 - 43 - 9 = 159
Number of athletes own a TV or a store not a convertible = 13 + 34 +71
= 118.
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The sum of the ages of two brothers Kofi and Kwaku is 35. Kofi age is 2/3 of Kwaku's age. find their ages.
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2/3 of 35 is 23. Kofi is 23.
Are the triangles similar?
These triangles are not similar.
These triangles are similar by AA.
These triangles are similar by SAS.
These triangles are similar by SSS.
Answers
Answer:
These triangles are not similar I think
Hi there! Let's solve this problem step by step. :)
We have two triangles, QRP and XYP. You're given a few values.
It is given that QR = 16. QP = 6 + 18. RP = 5 + 15. Go ahead and add those.
QR = 16, QP = 24, RP = 20.
Now XYP!
XY = 12. YP = 15. XP = 18.
If you know the corresponding parts between these triangles--they should be QR to XY, QP to YP, and RP to XP. Those are 16/12, 24/15, and 20/18. Divide those.
You get 1.3333, 1.6, and 1.1111. Your turn! Are they similar?
[P.S., if you're confused about the AA/SAS/SSS similarity postulates, that just means the sides they have in common. You're not given any angle measurements, so SAS (side angle side) is out. SSS is possible, but since the ratios aren't equivalent, SSS is out. Again, AA (angle-angle) isn't possible because you're not given any angle measurements.)
That's it! :)
Good day, friend.
bisects ∠EDG. Find the value of x
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Answer:
where is the question? please attatch the angle
Does anyone know these?
Answers
Answer:
1 = - 4 - 14 √3
2 = 9 - 11 √3
Step-by-step explanation:
Question 1
(-4√3 + 2)(√3 + 4)
Apply FOIL method
= (-4√3) √3 + (-4√3) . 4 + 2 √3 + 2 . 4
Apply minus-plus rules: + (-a) = -a
= -4 √3 √3 - 4 . 4 √3 + 2 √3 + 2 . 4
Simplify
= - 4 - 14 √3
Question 2
(-3 + √3)(1 + 4 √3)
Apply FOIL method
= (-3) . 1 + (-3) . 4 √3 + √3 . 1 + √3 . 4 √3
Apply minus-plus rules: + (-a) = -a
= -3 . 1 - 3 . 4 √3 + 1 . √3 + 4 √3 √3
Simplify
= 9 - 11 √3
K
The manager of a small company that produces roof tile has determined that the total cost in dollars, C(x), of
producing x units of tile is given by C(x)=200x+900, while the revenue in dollars, R(x), from the sale of x units of tile
is given by R(x) = 230x. Find the break-even point and the cost and revenue at the break-even point.
The break-even point is
units.
The cost at the break-even point is $
The revenue at the break-even point is
Answers
Answer: 30, 6900, 6900
Step-by-step explanation:
The break-even point is when cost equals revenue.
\(230x=200x+900\\\\30x=900\\\\x=30\)
The cost and revenue at x=30 are both $6900.
how do you indicate congruent segments in a diagram? how do you indicate congruent angles in a diagram?
Answers
9514 1404 393
Answer:
segments: using the same number of hash marksangles: using the same number of arcs, or hash marks on an arcStep-by-step explanation:
The attached diagram shows that segments AC and BD are congruent by using a single hash mark on each of those segments. If other segments are congruent, but not congruent to these two, the "decoration" would be different, probably two hash marks. Segments marked with the same "decoration" are intended to be understood as congruent.
__
The "decoration" used for congruent angles is an arc of some kind. Here, a single arc is used to signify angle CAB is congruent to angle DBA. Additional arcs could be used for other congruent angles, or hash marks can be put on the arcs.
Find the equation of the line with slope m=3/5 that contains the point (−5,−6).
Answers
Answer:
y = 3/5x - 1
Step-by-step explanation:
y = mx + b
m = slope
m = 3/5
to find the y - intercept we have to make x = 0 by adding or subtracting
in this case it is +5
add five to both x and y
\((-5, -6) + (5, 5) = (0, -1)\)
the y intercept focuses on what y is when x is 0
the y intercept in this case is -1
help me with this, please
Answers
Answer: B.) 240 / 100
Step-by-step explanation:
A percentage is x / 100
For example, 4% = 4 / 100.
So 240% is 240 / 100.
In the model the height of the climbing frame is 10 cm what is the actual height of the frame?
Answers
To determine the actual height of the climbing frame, we need to know the scale factor of the model. If the scale factor is, for example, 1:50, it means that every 1 cm on the model represents 50 cm in real life.
Assuming that we have the scale factor, we can use the following proportion:
model height / actual height = scale factor
We know that the model height is 10 cm, and we want to find the actual height. Let's say the scale factor is 1:100. Then we have:
10 cm / actual height = 1/100
Multiplying both sides by the actual height, we get:
actual height = (10 cm) x (100/1) = 1000 cm
Therefore, the actual height of the climbing frame in this example is 1000 cm, or 10 meters.
Rick was given 2 new gaming consoles for his birthday, one from each set of grandparents. He wants to return one of the consoles and use the store credit to buy new video games. He will receive $299 in store credit, and each video game costs $60. You can use a function to describe the amount of store credit he will have left after purchasing x video games. Write an equation for the function. If it is linear, write it in the form f(x)=mx+b. If it is exponential, write it in the form f(x)=a(b)x. f(x)=
don't spam ;-;
Answers
The linear function for the amount of store credit he will have left after purchasing x video games is given as follows:
f(x) = 299 - 60x.
How to obtain alinear function?
The slope-intercept definition of a linear function is given as follows:
y = mx + b.
In which:
The slope m represents the rate of change.The intercept b represents the value of y when x = 0.The parameters for this problem are given as follows:
b = 299, which is the initial credit that he has.m = -60, as for each videogame purchased, the amount of credit decays by $60.Hence the function is given as follows:
f(x) = 299 - 60x.
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Find: 1) left angle2) right angle 3) top angle 4) bottom angle
Answers
x+16=4x-5
x-4x=-5-16
-3x=-21
x=7
α=β
x+16=7+16=23? as 4x-5 =x+16, then 4x-5 will be 23°
α+β+23+23=360
2α= 360-23-23
2α=360-46
2α=314
α= 157°
Inscribe a circle in a unit square and to r= 1000 random.
a. Suppose that 760 of those darts land in the circle.
b. What would our estimate be if we let n â oo and we applied the same ratio strategy?
Answers
Step-by-step explanation:
area of square = 1
area of a circle in square = \(\pi r^2 = \pi *(1/2)^2 = \frac{\pi }{4}\)
bu estimate \(p^ = X/n = 760/1000 = 0.76
Therefore,
\(\frac{\pi }{4} \approx 0.76\)
\(\pi \approx 0.76*4 =3.04\)
b) if n tend to infinity
\(\pi will approach 3.14\)
Answer:
uvfhmfa
Step-by-step explanation:
The diagram shows EFG. Which term describes point H?
A. Circumcenter
B. Incenter
C. Orthocenter
D. Centroid
Answers
Point H is the ortho-center of our given triangle and option c is the correct choice.
We have been given an image of a triangle. We are asked to find the term that describes point H.
We can see that point H is the point, where, all the altitudes of our given triangle EFF are intersecting.
We know that ortho-center of a triangle is the point, where all altitudes of triangle intersect. Therefore, point H is the ortho-center of our given triangle and option c is the correct choice.
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Find the next two terms:
Answers
Answer:
56, 59
Step-by-step explanation:
Looks like you just add 3 each time
Answer: The equation is skip counting by 3’s
the answer is 56, and 59
x-intercept of 3 and y-intercept of 8
How do you write a lunar equation given this information and how do you write the equation in slope form
Answers
Answer:
y = -8/3x + 8
Step-by-step explanation:
Step 1: Identify which values we have and need to find in the slope-intercept form:
The general equation of the slope-intercept form of a line is given by:
y = mx + b, where
(x, y) is any point,m is the slope,and b is the y-intercept.Since we're told that the y-intercept is 8, this is our b value in the slope-intercept form.
Step 2: Find m, the slope of the line:
Since the x-intercept is 3, the entire coordinates of the x-intercept are (3, 0)Thus, we can find m, the slope of the line by plugging in (3, 0) for (x, y) and 8 for b:
0 = m(3) + 8
0 = 3m + 8
-8 = 3m
-8/3 = m
Thus, the slope is -8/3.
Therefore, the the equation of the line in slope-intercept form whose x-intercept is 3 and whose y-intercept is 8 is y = -8/3x + 8.
Optional Step 3: Check the validity of the answer:
We know that the entire coordinates of the x-intercept are (3, 0) and the entire coordinates of the y-intercept are (0, 8).Thus, we can check that we've found the correct equation in slope-intercept form by plugging in (3, 0) and (0, 8) for (x, y), -8/3 for m, and 8 for b and seeing if we get the same answer on both sides of the equation when simplifying:
Plugging in (3, 0) for (x, y) along with -8/3 for m and 8 for b:
0 = -8/3(3) + 8
0 = -24/3 + 8
0 = -8 = 8
0 = 0
Plugging in (0, 8) for (x, y) along with -8/3 for m and 8 for b;
8 = -8/3(0) + 8
8 = 0 + 8
8 = 8
Thus, the equation we've found is correct as it contains the points (3, 0) and (0, 8), which are the x and y intercepts.