Gestation Periods of Humans. Refer to the simulation of human gestation periods discussed in Example 6.4 on page 292.

a. Sketch the normal curve for human gestation periods.

b. Simulate 1000 human gestation periods. (Note: Users of the TI-83/84 Plus should simulate 500 human gestation periods.)

c. Approximately what values would you expect for the sample mean and sample standard deviation of the 1000 observations? Explain your answers.

d. Obtain the sample mean and sample standard deviation of the 1000 observations, and compare your answers to your estimates in part (c).

e. Roughly what would you expect a histogram of the 1000 observations to look like? Explain your answer.

f. Obtain a histogram of the 1000 observations, and compare your result to your expectation in part (e).