1. The personnel director of a large corporation wishes to study absenteeism among clerical workers at the corporations central office during the year. A random sample of 25 clerical workers reveals the following: Absenteeism; mean 9.7 days, standard deviation, 4.0 days; 12 clerical workers were absent more than 10 days (2 points)

a. Construct a 95% confidence interval estimate for the mean number of absences for clerical workers during the year (1 point)

b. Construct a 95% confidence interval estimate for the population proportion of clerical workers absent more than 10 days during the year (1 point)