Statistics Ch. 1 Review

Why is a sample used more often than a​ population?

It is usually impossible to count the entire population.

Determine whether the data set is a population or a sample. Explain your reasoning: The number of children in four houses on a street of 15.

Sample, because the collection of the number of children for four houses is a subset of all houses on the street.

Determine whether the data set is a population or a sample. Explain your reasoning: The heights of half of the students in a class

Sample, because the collection of heights of half of the students is a subset of all students in the class.

A polling organization contacts 1938 adult men who are 40 to 60 years of age and live in the United States and asks whether or not they had seen their family doctor within the past 6 months. What is the population in the​ study? What is the sample in the​ study?

The population are the adult men who are 40 to 60 years of age and live in the united states. The sample is The 1938 adult men who are 40 to 60 years of age and live in the United States.

Determine whether the data set is a population or a sample. Explain your reasoning: The age of each member of the House of Representatives.

​Population, because it is a collection of ages for all members of the House of Representatives.

Determine whether the data set is a population or a sample. Explain your reasoning: The age of each resident in an apartment building.

​Population, because it is a collection of ages for all people in the apartment building.

What is the difference between a parameter and a​ statistic?

A parameter is a numerical description of a population characteristic. A statistic is a numerical description of a sample characteristic.

How is a sample related to a​ population?

A sample is a subset of a population.

In a​ poll, 1,005 women in a country were asked whether they favor or oppose the use of​ "federal tax dollars to fund medical research using stem cells obtained from human​ embryos." Among the​ respondents, 46​% said that they were in favor. Describe the statistical study. What is the population in the given​ problem? Identify the sample for the given problem.

Population is all women in the country. Sample is the 1,005 women selected.

A survey of 12,088 men in a particular country found that 46.4​% received an influenza vaccine for a recent flu season. Identify the population and the sample.

Population is the immunization status of all men in the country. Sample is the immunization status of the 12,088 men selected.