Statistics Sampling Method

If you survey every third house on a street, what type of sampling technique are you using?

A group of lobbyists has a list of 100 senators. They decide to talk to every 7th senator on the list about their position on farm subsidies.

• Convenience

• Systematic

• Stratified

• Simple Random

A teacher puts all her students' names in hat, then selects 3 names from the hat. These students will take a standardized test.

• Convenience

• Systematic

• Stratified

• Simple Random

The president of a college randomly selects 2 students from each department to serve on a student advisory board.

• Convenience

• Systematic

• Stratified

• Simple Random

Which of the following methods would be the best way to get a representative sample of people living in Mineola?

• ask every fifth person walking into Roosevelt Field Mall on a Saturday morning

• ask the members of the Mineola Chamber of Commerce

• ask the fourth graders at Jackson Ave.

• randomly select 50 addresses from a list of all Mineola residences and call those households

What is a representative sample?

• A sample that includes every member of the population.

• B sample that reflects the distribution of the population in terms of center, shape, and spread.

• C sample taken from a specific subgroup of the population.

• D sample that is taken randomly without any specific criteria.

What type of sampling is shown?

• Simple Random Sample

• Systematic Sample

• Cluster Sample

• Stratified Sample

A student wants to know which type of pizza the students at his high school prefer. Which option would give an unbiased, representative sample:

• Asking all the students in the hot lunch line.

• Asking 10 random students from each homeroom.

• Asking every other student who gets off a school bus.

• Asking all the 10th graders.

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.

She picks the student in every 5th seat.

• Simple Random

• Systematic

• voluntary response

• convenience

State the type of sample. In order to determine the average IQ of ninth-grade students, a school psychologist obtains a list of all schools in the local public school system. She randomly selects five of these schools and administers an IQ test to all ninth-grade students at the selected schools.

• Stratified Random Sample

• Cluster Sample

• SRS

• Random Sample