4. State the null and alternative hypotheses in math notation.

4(b). A nationwide clothing store has found that the average customer wait time to get checked out is 9 minutes with a standard deviation of 2 minutes. A branch manager has hired more personnel in order to reduce the amount of customer wait time. He takes a random sample of 50 customers and finds that the average wait time is 8 minutes.

H₀: [ Select ] ["", "p"] [ Select ] ["<", "=", "", ">"] [ Select ] ["50", "9", "8", "2"]

H_a: [ Select ] ["p", ""] [ Select ] ["<", ">", "=", ""] [ Select ] ["8", "2", "9", "50"]

5. State the only two possible conclusions in a test of a statistical hypothesis. (Select all that apply.)

Group of answer choices

-The data do not provide sufficient evidence that the null hypothesis is true.

-The data provide sufficient evidence that the alternative hypothesis is true.

-The data provide sufficient evidence that the null hypothesis is true.

-The data do not provide sufficient evidence that the alternative hypothesis is true.