Chapter 12, Problem 1RE

a. What is a population?

b. What is a sample?

To determine

To explain: What is population?

Explanation of Solution

The group of objects is called population.

All items or people of interest in an experiment are collectively called a population.

For example, the trees in the forest, the stars in the sky, etc.

To determine

To explain: What is sample?

Explanation of Solution

Randomly selected objects from the population to make a conclusion is called sample.

That is, a subset of a population used by statisticians to make predictions about a population is called a sample.

For example, select a random number of persons in the city to predict the seriousness of the disease in that city.