A Quality Analyst wants to construct a control chart for determining whether three machines,all producing the same product,are under control with regard to a particular quality variable.Accordingly,he sampled four units of output from each machine,with the following results: What is the sample mean for machine #1?
A)15
B)16
C)17
D)21
E)23

Question

A Quality Analyst wants to construct a control chart for determining whether three machines,all producing the same product,are under control with regard to a particular quality variable.Accordingly,he sampled four units of output from each machine,with the following results:  What is the sample mean for machine #1?
A)15 
B)16 
C)17 
D)21 
E)23

Quizplus · Accepted Answer

The sample mean for machine #1 is (14+15+16+17)/4 = 15.5, which is closest to option B.

A Quality Analyst Wants to Construct a Control Chart for Determining