The average age of trees in a large local park is 60 years, with a standard deviation of 2.2 years. A simple random sample of 400 trees is selected, and the sample mean age x̄ of these trees is computed. What is a statistic in this scenario?

Question

Quizplus · Accepted Answer

A statistic is a numerical value calculated from a sample. In this scenario, the sample mean age (x̄) of the 400 trees is a statistic because it is calculated from a sample. The average age of 60 years is a population parameter since it is the average age of all the trees in the large local park, and the standard deviation of 2.2 years is also a population parameter.

The Average Age of Trees in a Large Local Park