Hypothesis Testing (Traditional method - Z-critical) [10 marks] (1) A random sample of 50 items gave a sample mean of 28 and a sample standard deviation of 16. Test at the =0.05 level of significance whether or not the population mean is equal to 33. Use the P-value method to test the following Hypothesis (Q2) [10 marks] (2) At the = 0.05 level, test the claim that the proportion of defects for hair dryers is 0.3. If a random sample of 200 hair dryers had 57defects.