Before the campaign the average purchase was 10 gallons. In a random sample of 30 motorists, the mean purchase is 11.3 gallons with a sample standard deviation of 3.1 gallons. At the 1% level of significance, test whether the average purchase is larger than 10 gallons.

3)Compute the test statistic with 2 decimals.

4)What are the degrees of freedom for the test statistics?

5)What is the critical value for rejecting the null hypothesis? You can either round up or down with your degrees of freedom when you look up the number in the t table.

6)What is your conclusion?

Group of answer choices

Reject the null hypothesis.

Do not reject the null hypothesis.