MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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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.
What are the null and alternative hypotheses?
OA. Ho: H₁ H₂
H₁: H₁ H₂
OC. Ho: H₁ H₂
H₁ H₁ H₂
(Round to two decimal places as needed.)
The P-value is (Round to three decimal places as needed.)
The test statistic, t, is
State the conclusion for the test.
...
OB. Ho: H₁ <H₂
H₁ H₁ H₂
OD. Ho: H₁ H₂
H₁: Hy <H₂
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.
OC. 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.
OD. 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.
b. Construct a confidence interval suitable for testing the claim that the two samples are from populations with the same mean.
0<41-4₂-0
(Round to three decimal places as needed.)
H
n
X
S
Treatment Placeb
H₁
25
2.33
0.61
H₂
36
2.65
0.89
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