Question

A manufacturing company produces electric insulators. You define the variable of interest as the strength of the insulators. If the insulators break when in use, a short circuit is likely. To test the strength of the insulators, you carry out destructive testing to determine how much force is required to break the insulators. You measure force by observing how many pounds are applied to the insulator before it breaks. You collect the force data for 30 insulators selected for the experiment and find out that the mean force is 1670. The population mean force that you try to estimate is_______.

a. a confidence interval.
b. a statistic.
c. a point estimate.
d. a parameter.
e. an interval estimate.

Answer 1

b. a statistic.

Explanation:

the value 1670 is regarded as a statistic. this is because it is a representation of the value of a sample. from the question we get that destructive testing is being done this shows is that what we have here is a sample.

the mean force 1670 is not a parameter, a point estimate, a confidence interval or interval estimate. therefore option b is the answer.