The total energy need during pregnancy is normally distributed, with mean = 2600 kcal/day and standard

Question:

The total energy need during pregnancy is normally distributed, with mean µ = 2600 kcal/day and standard deviation σ = 50 kcal/day. Source: American Dietetic Association

(a) Is total energy need during pregnancy qualitative or quantitative?

(b) What is the probability that a randomly selected pregnant woman has an energy need of more than 2625 kcal/day? Is this result unusual?

(c) Describe the sampling distribution of x̅, the sample mean daily energy requirement for a random sample of 20 pregnant women. What might be the source of variability in the sample mean?

(d) What is the probability that a random sample of 20 pregnant women has a mean energy need of more than 2625 kcal/day? Is this result unusual?

Distribution
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