Pregnancy Length Use the normal distribution in Exercise 15.

(a) What percent of the new mothers had a pregnancy length of less than 280 days?

(b) What percent of the new mothers had a pregnancy length of between 250 and 275 days?

(c) Out of 500 randomly selected new mothers, about how many would you expect to have had a pregnancy length of greater than 290 days?

Answer the questions about the specified normal distribution.

Data from Exercises 15

A member is selected at random from the population represented by the graph. Find the probability that the member selected at random is from the shaded region of the graph. Assume the variable x is normally distributed.

Transcribed Image Text:

Pregnancy Length in a Population of New Mothers 285 < x <294 =267 0=10 240 285 294 Pregnancy length (in days) x