The dataset StudentSurvey has information from males and females on the number of hours spent exercising in a typical week. Computer output of descriptive statistics for the number of hours spent exercising, broken down by gender, is given:

(a) How many females are in the dataset? How many males?

(b) In the sample, which group exercises more, on average? By how much?
(c) Use the summary statistics to compute a 95% confidence interval for the difference in mean number of hours spent exercising. Be sure to define any parameters you are estimating.
(d) Compare the answer from part (c) to the confidence interval given in the following computer output for the same data:

(e) Interpret the confidence interval in context.

Transcribed Image Text:

Descriptive Statistics: Exercise Variable Gender N Mean StDev 5.199 Exercise 168 8.110 193 9.876 6.069 Q1 Median Minimum Q3 Maximum 7.000 12.000 27.000 0.000 4.000 40.000 0.000 5.000 10.000 14.000 Two-sample T for Exercise Gender N Mean StDev SE Mean 168 8.11 5.20 0.40 193 9.88 6.07 0.44 Difference = mu (F) – mu (M) Estimate for difference: -1.766 95% Cl for difference: (-2.932, –0.599)