
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Question 12 ignore this just keeping track

Transcribed Image Text: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 0.10 significance level for both parts.
H
n
X
S
OB. Fail to reject the null hypothesis. There is sufficient 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.
Treatment Placebo
P1
H2
27
36
2.39
2.62
0.68
0.97
O 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.
<H₁
(Round to three decimal places as needed.)
O D. 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.

Transcribed Image Text:K
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 0.10 significance level for both parts.
The test statistic, t, is (Round to two decimal places as needed.)
The P-value is (Round to three decimal places as needed.)
State the conclusion for the test.
F
P
n
X
S
Treatment Placebo
P1
12
27
36
2.39
0.68
O A. Reject the null hypothesis. There is sufficient evidence to warrant rejection of the claim that the two samples are from populations with the same
mean.
OB. Fail to reject the null hypothesis. There is sufficient evidence to warrant rejection of the claim that the two samples are from populations with the
same mean.
2.62
0.97
OC. 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
moon
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