Question 9 (1 point) A coffeehouse wishes to see if customers have any overall preference among five different brands of coffee. A sample of 200 customers was sorted according to their favourite brand below. Calculate the observed test statistic to test the claim that the distribution is uniform. Assume all assumptions have been met. Brand 1 2 3 4 5 Customers 30 55 65 18 32 O 37.45 48.91 45.91 29.53 55.63 The following two questions refer to the study below. Twenty patients with high blood pressure were randomly assigned in equal numbers to either a placebo group or a treatment group. The placebo group (M = 90.90. SD = 13.50) received MacBook Air DII DD F3 F4 F5 F6 F7 F8 F9 F10 # $ % & K 3 4 5 6 7 8 9 O E R T Y U O P D F G H J K L