Question 2 (10 marks) A random sample of 18 gas stations was sampled. Each gas station was asked how much money in sales it makes daily. The responses are listed below (thousand dollars); 50 48 65 74 66 37 45 68 64 65 58 55 52 63 59 57 74 65 It is known that o = 10 thousand dollars. Test to determine at the 5% significance level whether there is enough statistical evidence to infer that the mean amount of daily sales by all the stations is greater than 50 thousand dollars