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 standard deviation of the sampling distribution for an instructor's sample proportion of failures?

A) .0075
B) .03
C) .075
D) .3
E) .75