The personnel director of a large corporation wants to study absenteeism among clerical workers at the corporation's central office during the year. A random sample of 25 clerical workers reveals the following. Absenteeism: X=9.7 days, S=4.0 days. 12 clerical workers were absent more than 10 days.
Set up a 95% confidence interval estimate of the population proportion of clerical workers absent more than10 days last year.