A company has developed a new engine whose average lifetime is unknown.In order to estimate this average,100 engines are randomly selected from a large production line and tested; their average lifetime is found to be 11 years.The 11 years represents a:
A)parameter.
B)statistic.
C)sample.
D)population.

Question

Quizplus · Accepted Answer

The average lifetime of the 100 engines is a statistic because it is based on a sample (the 100 engines selected from the production line) and is used to estimate the population parameter (the true average lifetime of all engines produced by the company).

A Company Has Developed a New Engine Whose Average Lifetime