Stion 3 [14 marks) Part a) (7 marks) hypothesis test and interpret the result. Calculate the value of the test statistic, set up the rejection region, undertaking Given that o=5, n=25, X=21, a=0.05. Ho: M=20 HI: H# 20 Part b) (7 marks) A statistics practitioner is in the process of testing to determine whether is enough evidence to infer that the population mean is different from 180. She calculated the i) mean and standard deviation of a sample of 200 observations as X=175 and s=22. Calculate the value of the test statistic of the test required to determine whether there is enough evidence to infer at the 5% significance level that the population means is different from 180. ii) Repeat the part i) with the population standard deviation to be 22. QB-3 Numbered List (98 17) Type your answer here. 66 X HE BIAXXLEE ZQQQ DI AG MacBook Air CIO DII F7 F6 F5 & 0 V