Question

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 preselected 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) +3.5 +4.5 +1.1 +6.4 −1.5 (a) Find the confidence limits at a 95% CI for these related samples. (Round your answers to two decimal places.) to (b) Can we conclude that students retained more of the material taught in the Friday class? Yes, because 0 lies outside of the 95% CI. No, because 0 is contained within the 95% CI.

Difference Scores
(Friday − Monday)

+3.5

+4.5

+1.1

+6.4

−1.5

(a) Find the confidence limits at a 95% CI for these related samples. (Round your answers to two decimal places.)
to

(b) Can we conclude that students retained more of the material taught in the Friday class?

Yes, because 0 lies outside of the 95% CI. No, because 0 is contained within the 95% CI.  

Answer 1

= 2.8

s_D = 3.071

n = 5

A.

Confidence Interval (take X to be D)

B.

No, because 0 is contained within the 95% CI.  

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