A study was done on proctored and nonproctored tests. The results are shown in the table, Assume that the two samples are independent simple random samples seleded from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Proctored Nonproctored 35 T7 08 11.71 30 85.94 21.76 a. Use a 0.05 significance level to test the claim that students taking nonproctored tests get a higher mean score than those taking proctored tests.

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Q19 Find test statistic, p value and conclusion and construct a confidence interval . Does the confidence interval support the conclusion of the test?
The P-value is
(Round to three decimal places as needed.)
State the conclusion for the test.
O A. Fail to reject Ho. There is not sufficient evidence to support the claim that students taking nonproctored tests get a higher mean score than those taking proctored tests.
O B. Fail to reject Ho. There is sufficient evidence to support the claim that students taking nonproctored tests get a higher mean score than those taking proctored tests.
O C. Reject Ho. There is sufficient evidence to support the claim that students taking nonproctored tests get a higher mean score than those taking proctored tests.
O D. Reject Ho. There is not sufficient evidence to support the claim that students taking nonproctored tests get a higher mean score than those taking proctored tests.
b. Construct a confidence interval suitable for testina the claim that students takina nonproctored tests get a higher mean score than those takina proctored tests.
Transcribed Image Text:The P-value is (Round to three decimal places as needed.) State the conclusion for the test. O A. Fail to reject Ho. There is not sufficient evidence to support the claim that students taking nonproctored tests get a higher mean score than those taking proctored tests. O B. Fail to reject Ho. There is sufficient evidence to support the claim that students taking nonproctored tests get a higher mean score than those taking proctored tests. O C. Reject Ho. There is sufficient evidence to support the claim that students taking nonproctored tests get a higher mean score than those taking proctored tests. O D. Reject Ho. There is not sufficient evidence to support the claim that students taking nonproctored tests get a higher mean score than those taking proctored tests. b. Construct a confidence interval suitable for testina the claim that students takina nonproctored tests get a higher mean score than those takina proctored tests.
A study was done on proctored and nonproctored tests. 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.
Proctored Nonproctored
35
77.08
S 11.71
30
85.94
21.76
a. Use a 0.05 significance level to test the claim that students taking nonproctored tests get a higher mean score than those taking proctored tests.
What are the null and alternative hypotheses?
O A. Ho H=H2
O B. Ho: H1 =2
OC. Ho: H, #2
O D. Ho: H1 =H2
The test statistic, t, is . (Round to two decimal places as needed.)
Transcribed Image Text:A study was done on proctored and nonproctored tests. 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. Proctored Nonproctored 35 77.08 S 11.71 30 85.94 21.76 a. Use a 0.05 significance level to test the claim that students taking nonproctored tests get a higher mean score than those taking proctored tests. What are the null and alternative hypotheses? O A. Ho H=H2 O B. Ho: H1 =2 OC. Ho: H, #2 O D. Ho: H1 =H2 The test statistic, t, is . (Round to two decimal places as needed.)
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