Johnson et al. (A-16) performed a retrospective review of 50 fetuses that underwent open fetal myelomeningocele closure. The data below show the gestational age in weeks of the 50 fetuses undergoing the procedure.

(a) Construct a stem-and-leaf plot for these gestational ages.

(b) Based on the stem-and-leaf plot, what one word would you use to describe the nature of the data?

(c) Why do you think the stem-and-leaf plot looks the way it does?

(d) Compute the mean, median, variance, and standard deviation.

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