A sample of students from an introductory psychology class were polled regarding

Question

A sample of students from an introductory psychology class were polled regarding the number of hours they spent studying for the last exam. All students anonymously submitted the number of hours on a 3 by 5 card. There were 24 individuals in the one section of the course polled. The data was used to make inferences regarding the other students taking the course. There data are below: 4.5 22 7 14.5 9 9 3.5 8 11 7.5 18 20 7.5 9 10.5 15 19 2.5 5 9 8.5 14 20 8 Find a 95 percent confidence interval. What does this tell us?

Explanation / Answer

Sample Mean will be calculated as = 10.91667

Sample Standard deviation = 5.598266

Margin of error = (2.068658*5.598266)/Sqrt(24) = 2.36394

95% Interval

(10.91667-2.36394, 10.91667+2.36394)

= (8.5527, 13.2806)

So, 95% Interval is (8.5527, 13.2806)

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