An experiment was conducted to determine whether giving candy to dining parties resulted in greater tips. The mean tip percentages and standard deviations are given in the accompanying table along with the sample sizes. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b). -C μ n x S D No candy Two candies H₂ 39 21.01 FF 39 18.83 1.49 2.45 What are the null and alternative hypotheses? OA. Ho: H1 H2 H₁₁₂ OC. Ho: HP2 H₁: H1 H2 The test statistic, t, is -4.75. (Round to two decimal places as needed.) The P-value is 0.000. (Round to three decimal places as needed.) State the conclusion for the test. B. H₂ =12 H₁₁₂ OD. Ho: H1 H2 H₁: H1 H2 A. Reject the null hypothesis. There is sufficient evidence to support the claim that giving candy does result in greater tips. OB. Fail to reject the null hypothesis. There is not sufficient evidence to support the claim that giving candy does result in greater tips. C. Fail to reject the null hypothesis. There is sufficient evidence to support the claim that giving candy does result in greater tips. OD. Reject the null hypothesis. There is not sufficient evidence to support the claim that giving candy does result in greater tips. b. Construct the confidence interval suitable for testing the claim in part (a). Окна-нако (Round to two decimal places as needed.)
An experiment was conducted to determine whether giving candy to dining parties resulted in greater tips. The mean tip percentages and standard deviations are given in the accompanying table along with the sample sizes. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b). -C μ n x S D No candy Two candies H₂ 39 21.01 FF 39 18.83 1.49 2.45 What are the null and alternative hypotheses? OA. Ho: H1 H2 H₁₁₂ OC. Ho: HP2 H₁: H1 H2 The test statistic, t, is -4.75. (Round to two decimal places as needed.) The P-value is 0.000. (Round to three decimal places as needed.) State the conclusion for the test. B. H₂ =12 H₁₁₂ OD. Ho: H1 H2 H₁: H1 H2 A. Reject the null hypothesis. There is sufficient evidence to support the claim that giving candy does result in greater tips. OB. Fail to reject the null hypothesis. There is not sufficient evidence to support the claim that giving candy does result in greater tips. C. Fail to reject the null hypothesis. There is sufficient evidence to support the claim that giving candy does result in greater tips. OD. Reject the null hypothesis. There is not sufficient evidence to support the claim that giving candy does result in greater tips. b. Construct the confidence interval suitable for testing the claim in part (a). Окна-нако (Round to two decimal places as needed.)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:An experiment was conducted to determine whether giving candy to dining parties resulted in
greater tips. The mean tip percentages and standard deviations are given in the accompanying
table along with the sample sizes. Assume that the two samples are independent simple random
samples selected from normally distributed populations, and do not assume that the population
standard deviations are equal. Complete parts (a) and (b).
-C
μ
n
x
S
D
No candy
Two candies H₂ 39 21.01
FF
39 18.83
1.49
2.45
What are the null and alternative hypotheses?
OA. Ho: H1 H2
H₁₁₂
OC. Ho: HP2
H₁: H1 H2
The test statistic, t, is -4.75. (Round to two decimal places as needed.)
The P-value is 0.000. (Round to three decimal places as needed.)
State the conclusion for the test.
B. H₂ =12
H₁₁₂
OD. Ho: H1 H2
H₁: H1 H2
A. Reject the null hypothesis. There is sufficient evidence to support the claim that giving candy does result in greater tips.
OB. Fail to reject the null hypothesis. There is not sufficient evidence to support the claim that giving candy does result in greater tips.
C. Fail to reject the null hypothesis. There is sufficient evidence to support the claim that giving candy does result in greater tips.
OD. Reject the null hypothesis. There is not sufficient evidence to support the claim that giving candy does result in greater tips.
b. Construct the confidence interval suitable for testing the claim in part (a).
Окна-нако
(Round to two decimal places as needed.)
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps with 2 images
Recommended textbooks for you
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman