+ LD Page view A" Read aloud Draw 5. (20 points) The weight of an item follows normal distribution. The mean weight is 45 and its variance is 8. A sample of 15 items is taken, (a) (4 points) What is the probability of the sample mean being at least 44? (b) (4 points) What is the probability of the sample mean being not less than 43 but at most 46? (c) (4 points) What is the probability of the sample mean being within 2 of the population mean? (d) (4 points) What is the probability of the sample mean being less than 48? O Hi W