9.33 StatCrunch for statistics For effective learning, an instructor advised his students to practice solving statistical problems on StatCrunch, a web-based software, at least 7 hours per week. In an in-class activity, a student surveyed 15 of her 35 classmates to assess the number of hours they spend per week practicing statistics on StatCrunch. The following data was collected:

6.5, 4, 3.5, 0, 12, 5, 12, 15, 12, 0, 1, 8, 0.5, 2, 7 Is there strong evidence that the mean number of hours of StatCrunch usage in the entire class is larger than 7?

Answer by:

a. Identifying the relevant variable and parameter.

b. Stating null and alternative hypotheses.

c. Finding and interpreting the test statistic value.

d. Reporting and interpreting the P-value and stating the conclusion in context.