Sampling and Surveys

The population in a statistical study is:

• Part of the group we want information about.

• A random part of the group we want information about.

• The entire group we want information about.

• A similar group we want information about.

A census collect data:

• From random individuals in the population.

• From every individual in the population.

• From a simple random sample of the population.

• From exactly half the population.

A sample is:

• a subset of the population.

• the entire population.

• a group similar to the population.

• something free you get at Costco.

A sample survey is:

• the process of selecting a specified number of samples from multiple samples of a survey.

• a study that collects data from a sample that is chosen to represent a specific population.

• is limited to a study that asks people questions.

• designed in a way that limits the answers to a question by offering choices in multiple choice format.

An example of convenience sampling is:

• asking students about dismissal times in school by surveying students as they enter the student parking lot.

• ask people to click a link to a survey online.

• pick every third person from a list of people to be surveyed.

• can only be done at a Circle K store.

An example of a voluntary response sampling is:

• asking students about dismissal times in school by surveying students as they enter the student parking lot.

• ask people to click a link to a survey online.

• pick every third person from a list of people to be surveyed.

• surveying students from the University of Tennessee.

Click all that are true about a simple random sample.

• A SRS gives every group of a specified amount of individuals an equal chance to be selected as the sample.

• An SRS gives every individual in a population a chance to be selected more than once.

• The SRS can be chosen using a random number generator.

• The SRS can be selected using a table of random numbers.

Stratified random samples are selected by choosing an SRS from each strata of a population.

• True

• False

A cluster sample is an SRS.

• True

• False

Undercoverage occurs when:

• Some members of the population hide under their bed.

• not enough people are in the sample.

• the sample proportion matches the population proportion for a given characteristic.

• some members of the population are less likely to be chosen or cannot be chosen.