Suppose Burger King has run a major advertising campaign in the hopes of increasing monthly sales. To investigate the effectiveness of this campaign. Burger King randomly selected six restaurants and recorded monthly sales before and after the advertising. The following data represents these sales figures in thousands of dollars. Use a = 0.05. Restaurant 1 2 3 4 5 6 After $123 $122 $145 $156 $160 $134 Before $107 $110 $143 $168 $145 $125 a. What is the correct hypothesis statement for this hypothesis test? (the null or H should be stated so that it reflects the stmt you are trying to prove as false (aka the opposite of what the statement is testing)

b. Finding the critical value. i. Note level of significance... What tailed test is this?

ii. What is the critical value?

iii. Which distribution table did you use and why?

c. What is the standard error of the difference between two means for this hypothesis? value

d. Calculate the test statistic for this hypothesis.

e. What is the p-value for the hypothesis? Is the p-value or a larger? Interpret

f. Graph your rejection region and plot your test statistic and critical value:

g. State the conclusion for this hypothesis test

h. At a 95% level of confidence, what is the confidence interval for the difference in population means