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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

business   Operations-Management   
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Answer #1

Answer is Option b) 0.16

Explanation

Proportion of failures(of each Prof)=No: of failure/Number of Samples graded

Number of samples graded=100

Number of failures of Prof. D is 16

So Sample proportion of failures for Prof.D is 16/100=0.16

Answer is 0.16

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