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.

(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?

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...