Use the data in Table 4.21 summarizing the ???? = 200 observations on the variable age at menarche (AGMN) in the Benign Breast Disease data set, to answer the following questions.

(a) Estimate the proportion of women experiencing menarche at or before the age of 11.

(b) Estimate the proportion of women experiencing menarche after their 16th birthday.

(c) Estimate the mean age at which women experience menarche.

(d) Estimate the median age at which women experience menarche.

(e) Estimate the 75th percentile of the distribution of age at which women experience menarche.