Please show work and explain for both :)

D Question 17 1 pts A restaurant has an average bill of $71.60 before an advertising campaign and a change in menu. After the advertising campaign and menu change, managers take a random sample of 250 bills (tables) and find an average bill of $73.40 and a sample standard deviation of $38.6. Conduct a hypothesis test to determine whether the new campaign and menu have increased the average bill above the previous average of $71.60. Hint, the null hypothesis is Ho / $ 71.60 What is the test statistic for a level of significance of 0.05? Answer to three decimal places. Question 18 1 pts A restaurant has an average bill of $71.60 before an advertising campaign and a change in menu. After the advertising campaign and menu change, managers take a random sample of 250 bills (tables) and find an average bill of $73.40 and a sample standard deviation of $38.6. Managers conduct a hypothesis test to determine whether the new campaign and menu have increased the average bill above the previous average of $71.60. Managers O Fail to reject (accept) the null O Reject the null hypothesis