a) calculate the 95% confidence interval showing your workb) provide a hypothesis test decision and explain your reasoning.

6% Discussion Details y in Psych... SU21 PSYCH 2220 - Data Anly in Psych (14550) The sample are the same people, measured twice under two different conditions (paid at cashier A and paid at cashier B). Step 1 : Pop 1 : Individual pays at Cashier A Pop 2 : Individual pays at Cashier B. Distribution : Mean difference scores Test , Paired - samples + - test Step 2 : Ho : MI = MJ HIM. + Ma Null hypothesis : There is no difference in waiting time between people pay at ffec... Cashier A and people pay at Cashier 59 PM B Research hypothesis : There is a difference d 7 in waiting time between people pay at 1:59...> Cashier A and people pay at Cashier B. Step 3 : and Data Diff 59... D- Mean - - C JN W D F W N 4 Of - C. 59... 6 6 = 5 : 1.414 Ja 8 M 2 = 0.707. Step 4 : 2 - tailed Q =. 05 df = 3 ". +- crite - 13. 182. Step 5 : t stat = 2 = 2.83 0. 707