A study suggests that the average college student spends 20 hours per week preparing for classes. A research team believes this claim is an overestimate and decided to collect their sample for a hypothesis test.

a) Fill in the missing value in the null hypothesis below:

0:0=_____

b) Write out your team's alternative hypothesis in notation form:

1:____________

c) The team randomly recruits 35 students for the study. Based on this sample size, should they use a z or t test statistic for the hypothesis test? Explain reasoning.

d) Write out the decision rule for the hypothesis test. Make sure to include the appropriate z or t critical value. Assume a 5% significance level.

e) On average, the team found that the 35 subjects in the sample spent 15.8 hours a week preparing for classes with a standard deviation of 8.9 hours. Use this information to calculate the appropriate test statistic.

f) Make a decision using the decision rule in (d) and the calculated test statistic in (e). Write out an appropriate conclusion.