Test Booklet AP CollegeBoard AP Statistics Name Unit 7, part 2 Test (MC) 1. A statistics student wants to compare the mean times needed to access flight information for two major airlines. Twenty randomly selected students accessed one airline's Web site, and the time required to locate the flight information using the Web site had a mean of 2.5 minutes and a standard deviation of 0.8 minute. Twenty different randomly selected students accessed the other airline's Web site, and the time required to locate the flight information using the Web site had a mean of 2.1 minutes and a standard deviation of 1.1 minutes. Assuming that the conditions for inference are met, which of the following statements about the p- value obtained from the data and the conclusion of the significance test is true?
A. The p-value is less than 0.01; therefore, there is a significant difference in mean search times on the two Web sites
B. The p-value is greater than 0.01 but less than 0.05, therefore, there is a significant difference in mean search times on the two Web sites.
C. The p-value is greater than 0.05 but less than 0.10, therefore, there is a significant difference in mean search times on the two Web sites.
D. The p-value is greater than 0.10, therefore, there is no significant difference in mean search times on the two Web sites
E. Since this is a matched-pairs situation, additional information is needed to perform a test of significance

Answer:

The statement about the p-value obtained from the data and the conclusion of the significant test that is true is option D

D. The p-value is greater than 0.10, therefore, there is no significant difference in mean search times on the two Web sites

Step-by-step explanation:

From the question, the statistics student wants to compare the mean times needed to access flight information for two airlines

Let 'A' represent one of the airlines and let 'B' represent the other airline

In the statistics hypothesis test we have;

The mean time to access airline A's website, [tex]\overline x_1[/tex] = 2.5 minutes

The standard deviation to access airline A's website, s₁ = 0.8 minutes

The mean time to access airline B's website, [tex]\overline x_2[/tex] = 2.1 minutes

The standard deviation to access airline B's website, s₂ = 1.1 minutes

The t-test is given as follows;

The null hypothesis is H₀; μ₂ - μ₁ = 0

The alternative hypothesis is H₀; μ₂ - μ₁ ≠ 0

[tex]t=\dfrac{(\bar{x}_{1}-\bar{x}_{2})}{\sqrt{\dfrac{s_{1}^{2} }{n_{1}}+\dfrac{s _{2}^{2}}{n_{2}}}}[/tex]

The critical-t at n₁ + n₂ - 2 = 20 + 20 - 2 = 38 degrees of freedom is therefore, from a graphing calculator, the critical-t = ±2.734 and the probability = 0.197;

[tex]t=\dfrac{(2.5-2.1)}{\sqrt{\dfrac{0.8^{2} }{20}+\dfrac{1.1^{2}}{20}}} \approx 1.32[/tex]

Therefore, given that the test statistic is smaller than the critical-t, and the p-value is greater than the significance level of 0.01 and is also larger than 0.10, therefore, there is no significant difference in mean search times on the two Web sites.

Two functions are described below

·Function 1: y is defined as a function of x by the equation y = 3 - 3x/5.

·Function 2: y is defined as a linear function of x by the table:

X Y
-5 12
-1 7.2
2 3.6
8 -3.6


Which statement is true?

A. The y-intercept of Function 2 is half the y-intercept of Function 1.
B. The y-intercept of Function 1 is half the y-intercept of Function 2.

Which value of x satisfies the inequality below?

1/3< x
A. 1/8
B. 1/4
C. 1/3
D. 1/2

What is the volume of the triangular prism below? A.180 B.18 C.30 D.22.5

what is this area? marking brainliest if more than one answers and giving thanks to correct! giving thanks to who can help in general, thank you

Line r is parallel to line c

which angle is congruent to ∠3?
O ∠2
O ∠4
O ∠5
O ∠6​

Answer YES if is a Right Triangle or NO if is not
Prove that each example below is a Pythagorean triple.
Part A: 77,420,427
Select)
Part B: 279,440,521
Select)
Part C: 39,760,761
[Select
HELP PLEASEEE

Betsy sells laptops at an electronics store. She earns $180 a week, plus $15 for every laptop she sells. Betsy needs to earn at least $900 this week to meet her sales goal. Write and solve an inequality that can be used to determine the number of laptops Betsy needs to sell this week.

At a sale, books are sold at $90.75 each, which is 75% of the original price.

(i) what is the original price of the book?

(II) Paul buys 10 books at the sale and pays VAT of 16% on the sale price. Calculate the TOTAL amount he paid for 10 books.

someone help please!!!!

Find the measure of angle N

Help

is this relation a function

Easy points you know it’s easy points

During a fundraiser, Ms. Dawson’s class raised $560, which is 25% more than Mr. Casey’s class raised. How much money did Mr. Casey’s class raise?
A. $420
B. $448
C. $700
D. $2,240

Which are similar to AJKL? Label each Yes or No.
L
м
ALKM
AJLM
ΔKML

What is the 4th equivalent fraction to 1/2?

Can the sides of a triangle have lengths 1, 3, and 4?

please help
7x-y=23
y=4x-11

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For the right triangle shown, whih equation can be used to find the vaule of x

Which equation can be represented by the model given below?

In circle E, GH is a tangent, diameter FB and chords FD, BD, AB, and AD. Which of the statements is not true?

(answer choices in picture)

Solve the equation and check.
7y +9=5y-3
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
O A. The solution is
(Simplify your answer.)
OB. The solution is all real numbers.
O c. There is no solution,

Ella has three pitchers that each hold 1.5 liters of lemonade. She charges $0.38 for every 100 milliliters of lemonade.

How much will Ella make if she sells all of the lemonade in the pitchers?

oday, everything at a store is on sale. The store offers a 20% discount. **NUMBERS ONLY. NO SYMBOLS.** a. The regular price of a T-shirt is $18. What is the discount price? b. The discount price of a hat is $18. What is the regular price

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Two angles are supplementary (add up to 180 degrees).  The measure of one angle is ten more than the other. Find the measure of each angle.

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which polynomials are in standard form?

choose all answers that apply:

a. 3z-1
b. 2+4x-5x^2
c. -5p^5+2p^2-3p+1
d. none of the above

-6/5-2/3v+4/15+1/3v Combining like terms to create an equivalent expression

In your own words make a conjecture about the relation
between the side and interior angles of
an isosceles triangle:
​

2m² + 4m - 70
Factor and please show steps ​