QUESTION 4 [9 MARKS] The Food Lovers Market store at Maerua Mall only accepts "medium-headed" cabbages if their population mean weight is not less than 930 grams. The manager randomly selected twenty cabbages from the receive consignment and weighs each cabbage. Their weights are shown below 849 909 839 957 969 923 867 968 974 853 980 934 958 966 896 873 966 940 871 928 4.1 Calculate a point estimate for the true unknown population mean weight for the cabbages in the consignment. 4.2 [2] Compute a 90% confidence interval estimate for the unknown population mean weight for the cabbages in the consignment. [7]