The Chair of the Operations Management Department at Quality University

Multiple Choice

The Chair of the Operations Management Department at Quality University wants to construct a p-chart for determining whether the four instructors teaching the basic P/OM course are under control with regard to the number of students who fail the course.Accordingly,he sampled 100 final grades from last year for each instructor,with the following results: What is the estimate of the mean proportion of failures,(p̅) for these instructors?

A) .10
B) .11
C) .13
D) .16
E) .40