What is the sample mean for machine #1?
A)15
B)16
C)17
D)21
E)23

Name: What is the sample mean for machine #1? A)15 B)16 C)17 D)21 E)23
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Question

Quizplus · Accepted Answer

The sample mean is calculated by taking the sum of all observations and dividing by the number of observations. 
For machine #1, the sum of all 4 observations is 64 (12+16+18+18). Dividing 64 by 4 gives us 16, which is the sample mean for machine #1. Therefore, the best choice is B.

What Is the Sample Mean for Machine #1