Question

Calculate and interpret a confidence interval; perform hypothesis tests and interpret the results for a population standard deviation.

A manufacturing process requires that the length of the product be fairly consistent for quality control purposes.To formalize this requirement, the supervisor wants the standard deviation of the product’s length to be less than one tenth of an inch. Describe how he might test whether the manufacturing process is meeting this requirement.

There is no more info for the question, this is all there is! I was thinking about using the chi-square distribution, but wanted to make sure it was a sound decision.

Answer 1

Yes, you are right. In order to check whether the population standard deviation of product’s length is less than one tenth of an inch or not we use chi-square test.