Introduction to Statistics

Identify the population:

A survey of 500 adults in the U.S. found that 54% drink coffee daily.

• A. Collection of the 500 adults surveyed

• B. Collection of all adults in the U.S.

• C. 54%

• D. 500

Identify the sample:

A survey of 500 adults in the U.S. found that 54% drink coffee daily.

• A. Collection of the 500 adults surveyed

• B. Collection of all adults in the U.S.

• C. 54%

• D. 500

True or false:

In the statement “A survey of 500 adults in the U.S. found that 54% drink coffee daily” 54% is a parameter.

• A. TRUE

• B. FALSE

True or false:

The costs of items in a shopper’s grocery cart represent quantitative data.

• A. TRUE

• B. FALSE

True or false:

The social security numbers of students in a class represent quantitative data.

• A. TRUE

• B. FALSE

Identify the data set’s level of measurement:

The IQ scores of students in a class.

• A. Nominal

• B. Ordinal

• C. Interval

• D. Ratio

Identify the data set’s level of measurement:

The nationality of each person on an airplane.

• A. Ordinal

• B. Nominal

• C. Interval

• D. Ratio

Identify the data set’s level of measurement:

The salaries of nurses at a hospital.

• A. Nominal

• B.Ordinal

• C. Interval

• D. Ratio

Decide which method of data collection would be most appropriate:

A study of the effect of using MyStatLab on grades in a statistics course.

• A. Observational study

• B. Experiment

• C. Simulation

• D. Survey

Identify the sampling technique used:

Students are classified according to major. Twenty students are selected from each major and asked how often they use the library.

• A. Random sample

• B. Stratified sample

• C. Cluster sample

• D. Systematic sample