a. Test the claim that the two samples are from populations with the same mean. What are the null and alternative? hypotheses? A. HO?: 2 H1?: ??2

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Topic Video
Question
a. Test the claim that the two samples are from populations with the same mean.
What are the null and alternative? hypotheses?
A.
HO?: <?2
H1?: ??2
В.
HO?: ?1=?2
H1?: ?1? ?2
C.
HO?: ?1=?2
H1?: ?1> ?2
D.
HO?: ?1??2
H1?: ?1< ?2
The test? statistic, t =
?(Round to two decimal places as? needed.)
The? P-value =
(Round to three decimal places as? needed.)
State the conclusion for the test.
A.Rejectthe null hypothesis. There is sufficient evidence to warrant rejection of the claim that the two
samples are from populations with the same mean.
B.Fail to reject the null hypothesis. There is not sufficient evidence to warrant rejection of the claim that the
two samples are from populations with the same mean.
C.Reject the null hypothesis. There is not sufficient evidence to warrant rejection of the claim that the two
samples are from populations with the same mean.
D.Fail to reject the null hypothesis. There issufficient evidence to warrant rejection of the claim that the two
samples are from populations with the same mean.
b. Construct a confidence interval suitable for testing the claim that the two samples are from populations
with the same mean.
?<?1??2<?
?(Round to three decimal places as? needed.)
Transcribed Image Text:a. Test the claim that the two samples are from populations with the same mean. What are the null and alternative? hypotheses? A. HO?: <?2 H1?: ??2 В. HO?: ?1=?2 H1?: ?1? ?2 C. HO?: ?1=?2 H1?: ?1> ?2 D. HO?: ?1??2 H1?: ?1< ?2 The test? statistic, t = ?(Round to two decimal places as? needed.) The? P-value = (Round to three decimal places as? needed.) State the conclusion for the test. A.Rejectthe null hypothesis. There is sufficient evidence to warrant rejection of the claim that the two samples are from populations with the same mean. B.Fail to reject the null hypothesis. There is not sufficient evidence to warrant rejection of the claim that the two samples are from populations with the same mean. C.Reject the null hypothesis. There is not sufficient evidence to warrant rejection of the claim that the two samples are from populations with the same mean. D.Fail to reject the null hypothesis. There issufficient evidence to warrant rejection of the claim that the two samples are from populations with the same mean. b. Construct a confidence interval suitable for testing the claim that the two samples are from populations with the same mean. ?<?1??2<? ?(Round to three decimal places as? needed.)
Treatment Placebo
A study was done using a treatment group and a placebo group. The results are shown in the table.
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) below. Use a 0.05 significance level for both parts.
H1
H2
In
30
34
X
2.34
2.65
0.89
0.62
Transcribed Image Text:Treatment Placebo A study was done using a treatment group and a placebo group. The results are shown in the table. 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) below. Use a 0.05 significance level for both parts. H1 H2 In 30 34 X 2.34 2.65 0.89 0.62
Expert Solution
steps

Step by step

Solved in 3 steps with 2 images

Blurred answer
Knowledge Booster
Hypothesis Tests and Confidence Intervals for Means
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
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 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…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
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
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman