Reference no: EM132232520

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 (s_M1 - 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 __?__.