Introduction To Statistics

A flashcard set for statistics.

How is a sample related to a​ population?

A sample is a subset of a population.

A parameter is a numerical description of a _____ characteristic?

population

A statistic is a numerical description of a ______ characteristic?

sample

A statistic is a measure that describes a population characteristic? True or False.

False

What is a statistic?

A statistic is a measure that describes a sample characteristic.

The number of children for each household in a town.

Population because it is a collection of all the households in that town.

The carbon monoxide levels of 21 of 76 people who escaped a burning building. Population or sample?

A sample because the collection of 21 people is a subset of the 76 people who escaped a burning building.

The number of floors in each home in a town? Sample or Population?

A population because it includes ever home in the town.

A survey of 1021 U.S. adults found that 45.1​% have a favorable view of Cuba. Identify the population and the sample. Describe the sample data set. What is the population in the given​ problem?

The responses of all U.S. adults.

A survey of 1021 U.S. adults found that 45.1​% have a favorable view of Cuba. Identify the population and the sample. Describe the sample data set. Identify the sample for the given problem.

The 1021 U.S. adults selected.

A survey of 121 law firms in a country found that the average hourly billing rate for partners was $579. Identify the population.

All the law firms in the country.

A survey of 121 law firms in a country found that the average hourly billing rate for partners was $579. Identify the sample.

The law firms that were surveyed.

A survey of 121 law firms in a country found that the average hourly billing rate for partners was $579. Describe the sample data set.

The average hourly billing rate for partners of 121

law firms was $579.

In a national survey on substance abuse, 66.4 % of respondents who were college students aged 18 to 22 reported using alcohol within the past month. Parameter or statistic?

Statistic

A survey of 2213 adults in a country found that 79 think that militant terrorists are a major threat to the​ well-being of their country. Population parameter or sample statistic?

The number is a sample statistic because it describes the people in a​ sample, which is a subset of all of the people in the country.

Suppose a survey of 521 women in the United States found that 55​% are the primary investor in their household. Which part of the survey represents the descriptive branch of​ statistics? Make an inference based on the results of the survey. Choose the best statement of the descriptive statistic in the problem.

55% of women in the sample are the primary investor in their household.

Suppose a survey of 521 women in the United States found that 55​% are the primary investor in their household. Which part of the survey represents the descriptive branch of​ statistics? Make an inference based on the results of the survey. Choose the best inference from the given information.

About 55​% of women in the United States are the primary investor in their household.

Suppose a survey of 950 major dash appliance shoppers found that 28​% bought extended warranties. Which part of the survey represents the descriptive branch of​ statistics? Make an inference based on the results of the survey. Choose the best statement of the descriptive statistic in the problem.

28​% of major dash appliance shoppers in the sample bought extended warranties.

Suppose a survey of 950 major dash appliance shoppers found that 28​% bought extended warranties. Which part of the survey represents the descriptive branch of​ statistics? Make an inference based on the results of the survey. Choose the best inference from the given information.

About 28​% of major dash appliance shoppers

buy extended warranties.