Chapter 11, Problem 4CR

To determine

To explain:

The mean speed is a parameter or statistic

Answer to Problem 4CR

The mean speed is a statistic.

Explanation of Solution

Given information:

  $\mu =92.4mph$

Know that:

A parameter is an overview number that represents the entire population, like an average or percentage. A numerical description of a characteristic sample is called statistic.

In the given problem:

A pitcher throws $40$ fastballs in a game. A baseball analyst records the speeds of $10$ fastballs from the throwing $40$ fastballs. It has mean speed of $92.4mph$ .

Thus, the statement is a statistic since the data is about a baseball analyst record.