(b) The mean of 25 samples selected from a population of mean and 52 respectively. Test the hypothesis H.:=49Vs H:>49 at (c) After 68 72 71 Befor 71 64 70 e In an investigation to find out the effect of a diet on a patients weight, 10 patient were weighed before and after the administration of the drugs. The obtained results are as follows 75 75 64 67 74 60 Hand variance is 100 62 57 x=5 [4 marks] 75 82 69 84 76 72 Test hypothesis that the mean difference of mean is zero at 95% confidence level [10