An instructor believes that students do not retain as much information from a le
ID: 3246422 • Letter: A
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 test scores for material taught on Friday minus Monday are listed in the following table.
Difference Scores
(Friday - Monday)
+3.5
+1.1
+6.4
-1.6
+4.5
(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.
Explanation / Answer
The statistical software output for this problem is:
One sample T confidence interval:
: Mean of variable
95% confidence interval results:
Hence,
a) 95% confidence interval will be:
(-1.08, 6.64)
b) No, because 0 is contained within the 95% CI.
Variable Sample Mean Std. Err. DF L. Limit U. Limit var18 2.78 1.3890284 4 -1.0765611 6.6365611Related Questions
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