Population vs Sample

The entire set of items (who or what) from which data can be selected

• survey

• parameter

• population

• sample

Population or Sample?

A survey of 1353 American households found that 18% of the households own a computer.

• Population

• Sample

Population or Sample? The average weight of every person entering the mall within 3 hour period was 146 lb.

• Population

• Sample

Population or Sample?

All of the teachers in a school are surveyed on their meeting time preferences.

• Population

• Sample

A survey company was trying to see if people in a state thought the pollution was too high. Which choice best represents a population?

• Every person in the state

• A selection of people from each neighborhood in the state

• A selection of people who live near the highways

• A selection of people who live in small towns

What is the main difference between a population and a sample in statistical studies?

• A population includes only a subset of individuals, while a sample includes all individuals.

• A population is the entire group of interest, while a sample is a subset of the population.

• A sample includes all individuals, while a population includes only a subset.

• A sample is always larger than a population.

80 7th graders at CMS were asked what their favorite season was. Does this represent a population or a sample? ​ (a)  

• sample

• Population

Which of the following is a characteristic of a sample?

• It includes every individual in the population.

• It is always larger than the population.

• It is a subset of the population.

• It is the same as the population.

The cholesterol levels of 20 patients in a hospital with 100 patients.

• Population

• Sample

Your school has 450 students. You ask 45 of them to participate in a survey. Which group is the sample?

• 450 students

• 45 students