pls solve and show all calculations Robert read in a study that in the neighboring country the mean weight among males is 92 kg ( variance 16kg, sample size n = 10000). He got curious and decided to find out the mean weight in his own country and for that he weighted himself and four of his co-workers. The measurement in kilos were as follows: 113, 79, 81, 91, 86. a. calculate 95% prediction interval b. calculate 95% confidence interval for the mean c. calculate 95% confidence interval for the neighbouring country. d. compare the confidence intervals in b and c above and decide if the mean weights are statistically different in the two populations