Sampling Techniques

The group of individuals who actually have a chance of being selected for a survey is called the ______________________________. The set of all individuals who belong to the group being studied by a survey is called the _________________________.

• population, sample

• sample, population

• population, test group

• test group, population

Before a nation wide election, a polling place was trying to see who would win. Which choice best represents the POPULATION being studied?

• A selection of voters from one part of the nation

• A selection of voters of different ages

• All voters

• A selection of voters over age 50

Before a nationwide election, a polling place was trying to see who would win. Which choice represents the best and most realistic SAMPLE to take for this study?

• A selection of voters from one part of the nation

• A random selection of voters of different ages

• All voters

• A selection of voters over age 50

You want to poll the members of your grade and see what their favourite type of ice cream is. You don't have time to poll everyone. Which method is most likely to produce a random sample of the members of your class?

• listing the first 20 students that come to mind

• choosing the 20 oldest students in the class

• writing the name of each student on a separate piece of paper and then drawing 20 slips from a hat

• selecting the first 20 students to arrive at class

A psychologist is studying the sleep patterns of the 3960 students at her university. She decides to start by asking a sample of 30 students how many hours of sleep they get weekday nights. She assigns each student a number from 1 to 3960. She selects the sample by randomly choosing one of the first 132 numbers and every 132nd number thereafter. Which sampling technique is she using?

• Simple Random Sample

• Stratified Random Sample

• Cluster Sample

• Systematic Sample

A psychologist is studying the sleep patterns of the 3960 students at her university. She decides to start by asking a sample of 30 students how many hours of sleep they get weekday nights. The psychologist assigns each student a number from 0001 to 3960 and uses a computer to randomly generate a list of 30 numbers to select the students for the sample.

• Simple Random Sample

• Stratified Random Sample

• Cluster Sample

• Systematic Sample

A psychologist is studying the sleep patterns of the 3960 students at her university. She decides to start by asking a sample of 30 students how many hours of sleep they get weekday nights. Students are listed by the neighbourhood they live in. The psychologist randomly selects six neighbourhoods and used all participants in those neighbourhoods.

• Convenience Sample

• Convenience Sample

• Cluster Sample

• Systematic Sample

If I wanted to do a random sample of the population, but I wanted to make sure each ethnic group in Ontario was equally represented, which type of sampling technique would be the best choice?

• Simple Random Sample

• Voluntary Sample

• Systematic Sample

• Stratified Random Sample