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A) An instructor believes that students do not retain as much information from a lecture on a Friday compared to a Monday. To test this belief, the instructor teaches a small sample of college students some pre-selected material from a single topic on statistics on a Friday and on a Monday. All students received a test on the material. The differences in exam scores for material taught on Friday minus Monday are listed in the following table.
Difference Scores (Friday - Monday)
+1.0
+6.2
+3.5
+4.4
-1.5
a.1). Find the confidence limits at a 95% CI these related. (Round your answer to two decimal places).
__?__ to __?__
B )To save money, a local charity organization wants to target its mailing requests for donations to individuals who are most supportive of its cause. They ask a sample of 5 men and 5 women to rate the importance of their cause on a scale from 1 (not important at all) to 7 (very important). The ratings for men were M1 = 6.3.
The ratings for women were M2 = 5.1. If the estimated standard error for the difference (sM1 - M2) is equal to 0.25, then consider the following.
B.1) Find the confidence limits at an 80% CI for these two-independent samples. (Round your answers to two decimal places.)
__?__ to __?__.
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