T
thinksnow_365
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...on reaction time? A researcher is testing the effect of a new cold and flue medication on reaction time. A sample of n = 9 students is obtained and each student is given the normal dose of the medicine. Thirty minutes later, each student's reaction time is measured. The scores for the sample averaged M = 211 milliseconds with SS = 1152. Sssuming that reaction time for students in the regular population averages m = 200 milliseconds, are the data sufficient to conclude that the medication has a significant effect on reaction time? Compute a two-tailed test at the .05 level of significance.
Question 1 answers
A.The sample variance is 144 and the standard error is 4. For these data, t = 2.75, and the critical value is 1 = 2.306. Reject the null hypothesis and conclude that the medication has a significant effect on reaction time.
B.The sample variance is 144 and the standard error is 4. For these data, t = 2.75, and the critical value is 1.860. Fail to reject the null hypothesis and conclude that the medication does not have a significant effect on reaction time.
C.The sample variance is 128 and the standard error is 3.77. For these data, t = 2.92, and the critical value is 1 = 2.306. Reject the null hypothesis and conclude that the medication has a significant effect on reaction time.
D.The sample variance is 128 and the standard error is 3.77. For these data, t = 2.92, and the critical value is 1 = 1.860. Fail to reject the null hypothesis and conclude that the medication does not have a significant effect on reaction time.
Question 1 answers
A.The sample variance is 144 and the standard error is 4. For these data, t = 2.75, and the critical value is 1 = 2.306. Reject the null hypothesis and conclude that the medication has a significant effect on reaction time.
B.The sample variance is 144 and the standard error is 4. For these data, t = 2.75, and the critical value is 1.860. Fail to reject the null hypothesis and conclude that the medication does not have a significant effect on reaction time.
C.The sample variance is 128 and the standard error is 3.77. For these data, t = 2.92, and the critical value is 1 = 2.306. Reject the null hypothesis and conclude that the medication has a significant effect on reaction time.
D.The sample variance is 128 and the standard error is 3.77. For these data, t = 2.92, and the critical value is 1 = 1.860. Fail to reject the null hypothesis and conclude that the medication does not have a significant effect on reaction time.