Why is it that the correct answer is B? A statistician at a metal manufacturing plant is sampling the thickness of metal plates. If an outlier occurs within a particular sample, the statistician must check the configuration of the machine. The distribution of metal thickness has a mean 23.5 millimeters and a standard deviation 1.4. Based on the two-standard deviations rule for outliers, of the following, which is the greatest thickness that would require the statistician to check the configuration of the machine? A.) 19.3 mm B.) 20.6 mm C.) 22.1 mm D. 23.5 mm E. 24.9 mm
Why is it that the correct answer is B?
A statistician at a metal manufacturing plant is sampling the thickness of metal plates. If an outlier occurs within a
particular sample, the statistician must check the configuration of the machine. The distribution of metal thickness
has a
outliers, of the following, which is the greatest thickness that would require the statistician to check the
configuration of the machine?
A.) 19.3 mm
B.) 20.6 mm
C.) 22.1 mm
D. 23.5 mm
E. 24.9 mm
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But, the question is: which is the greatest thickness that would require the statistician to check the configuration of the machine? Is it not related to the upper outlier which is 26.3?