kcal kcal According to one association, the total energy needed during pregnancy is normally distributed, with mean u = 2600 and standard deviation o = 50 day day (a) Is total energy needed during pregnancy a qualitative variable or a quantitative variable? kcal (b) What is the probability that a randomly selected pregnant woman has an energy need of more than 2625 day ? Interpret this probability. (c) Describe the sampling distribution of x, the sample mean daily energy requirement for a random sample of 20 pregnant women. kcal (d) What is the probability that a random sample of 20 pregnant women has a mean energy need of more than 2625 day ? Interpret this probability. (a) Choose the correct answer below. Quantitative O Qualitative (b) P(X > 2625) = (Round to four decimal places as needed.)