The Normal Distribution: Exercise #3

Objective: Compute probabilities and quantiles from normal distributions of daily employee absences per 100 employees before and after a health improvement program.

Problem Description: A large corporation has (on the average) 5 absences per 100 employees per day and a standard deviation of 1 absence. After a health improvement program, the mean number of absences was reduced to 4 absences per 100 employees and the standard deviation was reduced to 0.8 absence.

The following normal Java applet displays the probabilities of a normal random variable, X, with a mean of 5 absences and a standard deviation of 1 absence. Use this applet to answer the questions below.