# Question

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

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

(b) Describe the sampling distribution of x̄, the sample mean daily energy requirement for a random sample of 20 pregnant women.

(c) 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?

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

(b) Describe the sampling distribution of x̄, the sample mean daily energy requirement for a random sample of 20 pregnant women.

(c) 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?

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