Q2. A company's management thinks that monthly sells have increased, and now average over 650 per month. The distribution is known to be normal We assume o = 10 is known N = 49 sample mean = 53.1 Test the claim at the 10% significance (a=.10). Given that , 0 = 10 N = 49 Sample mean = 53.1 a =0.10 To test hypothesis HO : H s 50 VS H1 : H > 50 Test Statistics X - H o/ VN = 53.1 - 50 10 V49 = 3.1 1.428570 Z = 2. 17 Critical value of