# Question

Use the data set from problem 21 of Chapter 3 on poor quality in the production of electric motors.
a. Find the standard deviation and range to summarize the typical batch-to-batch variability in quality of production.
b. Remove the two outliers and recompute the standard deviation and range.
c. Compare the standard deviation and range values with and without the outliers. In particular, how sensitive is each of these summary measures to the presence of outliers?

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• CreatedNovember 11, 2015
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