Would I use the central theorem or would I just use the 13.1 for the sigma?

1. For women aged 18 - 24, systolic blood pressure (in mm Hg) are normally distributed with a mean of 114.8 and a standard deviation of 13.1 (based on data from the National Health Survey). Hypertension is commonly defined as a systolic blood pressure above 140. (a) If a woman between the ages of 18 and 24 is randomly selected, find the probability that her systolic blood pressure is greater than 140. Draw and Label. PCX7/40) rich( 140, ET M = 114 -8 140 = 0.027 5= 13.1 (b) If 4 women in that age bracket are randomly selected, find the probability that their mean systolic blood pressure is greater than 140? Draw and Label. (c) Given that part (b) involves a sample size that is not larger than 30) why can the central limit theorem be used? 1