Question

The manufacturing company in Problem 3.60 also produces electric insulators. If the insulators break when in use, a short circuit is likely to occur. To test the strength of the insulators, destructive testing is carried out to determine how much force is required to break the insulators. Force is measured by observing how many pounds must be applied to an insulator before it breaks. Data are collected from a sample of 30 insulators. The file Force contains the strengths, as follows:
a. Compute the mean, median, range, and standard deviation for the force needed to break the insulators.
b. Interpret the measures of central tendency and variability in (a).
c. Construct a boxplot and describe its shape.
d. What can you conclude about the strength of the insulators if the company requires a force of at least 1,500 pounds before breakage?


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  • CreatedJuly 16, 2015
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