Manager of a company has record that the average height of male workers in his company is 166 cm with a S.D. of 5 cm. To test this record, a sample of 35 workers is taken and it is decided that if the sample average of heights comes out less than 164 then the recorded height will be rejected. i. Write null and alternate hypotheses in this case. ii. Test your hypothesis at 5% level of significance and draw your decision also show the critical region. (Tabulated value of Z at 5% for two tailed test is 1.96) 11:24 pm