Units of the population are grouped; one or more groups are selected at random. All units of that group are included in the sample.

Identify the sampling design: Mr. Rhoades puts all of his students' names in a hat and randomly selects one without looking.

Leslie wants to find out what show students watch the most. She surveyed the 9 youngest students in the elementary school. Is this sample of the students in the school likely to be representative?

Identify the sampling design: Mr. Rhoades asks Mr. May, his neighbor, who his favorite America's Got Talent contestant is

The conductor has control over the environment in this setting

Identify the sampling design: Student government randomly samples 25 students of each of the four classes.

This sample consists of units of the population that are easily accessible.

This sample consists of units of the population that chose to respond.

Units of the population are ordered in some fashion. Usually, every k-th unit is chosen.

This sample is selected by dividing the population into subgroups and then taking a fixed number of units from each group using the simple random sample.

Identify the sampling design: A campaign intern makes phone calls to ask questions to registered voters regarding their intention to vote on election day.

Elise, a supermarket employee, approached 50 random customers and asked whether they would be willing to discuss what they like most about the store. She interviewed the 22 who said yes. Is this sample of the supermarket's customers likely to be biased?

The conductor has no input or control over the environment in this situation

Identify the sampling design: SCPS wants to survey its employees. They pick 4 schools from the county and survey every single employee in each of the 4 buildings.

Identify the sampling design: Mr. Rhoades asks his roommate what his favorite TV show is

Cluster, stratified, simple random, systematic, and proportional are all types of

This method produces values that systematically differ from the population being sampled.

This sample consists of the entire population

Every possible group of units of the required size has the same chance of being the selected sample as any other sample of the same size.

Identify the sampling design: The LFCC registrar wants to investigate attitudes of their graduates. The registrar randomly selects 100 names from each of the four past graduating classes.

Identify the sampling design: School admin conducted a survey on post-graduation plans. Students of senior class 2018 were listed in order by class rank. The school selected a random number between 1 and 15, obtaining a number 11. Then, they selected every 11th student for the survey.