A grooery chain wants to know if the three types of advertisements affect the mean sales differently. They used each type of advertisement at four different randomly selected stores for a month and measured the sales {RM '0001 for each store at the end of the month. The results are as follow. Dascdpvaa Advertisement Statistic Mean 11.5000 Type 1 Std. Deviation 3.41565 Sum 46.00 Mean 10.0000 Sales Type 2 Std. Deviation 326599 Sum 40.00 Mean 7.5000 Type 3 Std. Deviation 2.51661 Sum 30.00 AROMA Sales Sum of uates dl Mean 8 uare F S . Between Groups A 2 16.333 D .235 WII'III'I Grams 88.000 9 c Total B 11 a) Using the sum of squares between groups formula, calculate the value of A. b) Compute the values of B, c and D. c) State the null and alternative hypothesis for the above study. d) Using the p-value method, is there any evidence to support that the types of advertisements affect the mean sales? Test at a=0.01