Stats

The terms descriptive statistics and inferential statistics can be used interchangeably.

false

What level of measurement is a person's "favorite sport"?

nominal

When TV advertisements report "2 out of 3 dentists surveyed indicated they would recommend Brand X toothpaste to their patients," an informed consumer may question the conclusion because the:

Advertisement does not include the total number of dentists surveyed

There are four levels of measurement: qualitative, quantitative, discrete, and continuous

false

The principal difference between the interval and ratio scale is that the ratio scale has a meaningful zero point.

true

The number of children in a family is a discrete variable.

true

Statistics is defined as a body of techniques used to facilitate the collection, organization, presentation, analysis, and interpretation of information for the purpose of making better decisions

true

Descriptive statistics are used to find out something about a population based on a sample.

false

Which of the following is an example of a continuous variable?

Correct Tons of concrete to complete a parking garage

Respondents were asked, "Do you now earn more than or less than you did five years ago?" What is this level of measurement?

ordinal

The main purpose of descriptive statistics is to:

Correct Summarize data in a useful and informative manner.

A population is a collection of all individuals, objects, or measurements of interest.

true

What type of variable is the number of auto accidents reported in a given month?

discrete

The average number of passengers on commercial flights between Chicago and New York City is an example of a statistic.

true

The ordinal level of measurement is considered the "lowest" level of measurement.

false

A store asks shoppers for their zip code to identify market areas. Zip codes are an example of ratio data.

false

The general process of gathering, organizing, summarizing, analyzing, and interpreting data is called ____________.

statistics

The performance of personal and business investments is measured as a percentage, "return on investment." What type of variable is "return on investment"?

continuous

What level of measurement is the Centigrade temperature scale?

Interval

The incomes of 50 loan applicants are obtained. Which level of measurement is income?

ratio

What type of variable is "pounds of popcorn" served at a movie theater?

continuous

The names of the positions in a corporation, such as chief operating officer or controller, are examples of what type of variable?

qualitative

If Gallup, Harris, and other pollsters asked people to indicate their political party affiliation as Democrat, Republican, or Independent, the data gathered would be an example of which scale of measurement?

nominal

The order that runners finish in a race would be an example of continuous data.

false

The reported unemployment is 5.5% of the population. What measurement scale is used to measure unemployment?

interval or ratio

Which one of the following is NOT an example of discrete data?

Correct Number of miles between New York City and Chicago

The branch of mathematics used to facilitate the collection, organization, presentation, analysis, and interpretation of numerical information is referred to as statistics.

true

If we select 100 persons from 25,000 registered voters and question them about candidates and issues, the 100 persons are referred to as the population.

false