I need help with the following 2 excersises. Using the 5 steps of hypothesis testing and I need to show all calculations,


Use the five-step procedure for hypothesis testing in the following exercises

12. The National Safety Council reported that 52 per cent of American turnpike drivers are men. A sample of 300 cars traveling outbound on the New Jersey Turnpike yesterday revealed that 170 were driven by men. At the .01 significance level, can we conclude that a larger proportion of men were driving on the New Jersey Turnpike than the national statistics indicate?

17. Ms. Lisa Morin is the budget director for Nexus Media, Inc. She would like to compare the daily travel expense for the sales staff and the audit staff. She collected the following sample information.

Audit ($) 131 135 146 165 136 142

Sales ($) 130 102 129 143 149 120 129

At the .10 significance level, can she conclude that the mean daily expenses are greater for the sales staff than the audit staff? What is the p-value?

Five-Step Procedure for Hypothesis Testing

1. Establish the hull hypothesis (H0) and the alternate hypothesis (H1).
2. Select the level of significance.
3. Select an appropriate test statistic.
4. Formulate a decision rule based on steps 1, 2, and 3 above.
5. Make a decision regarding the null hypothesis based on the sample information. Interpret the results of the test.