The Chair of the Operations Management Department at Quality University wants to construct a p-chart for…

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:

Instructor Number of Failures
Prof A 13
Prof B 0
Prof C 11
Prof D 16
Prof C
Prof D

What is the sample proportion of failures for Prof. D?
Select one:
a. 0
b. .16
c. .13
d. .11
e. .04