Sampling and Surveys

The principal randomly selects four classes and surveys each student in those classes. What kind of sampling technique is used?

• Simple random sampling

• Cluster sampling

• Stratified sampling

• Systematic Sampling

Group the businesses according to type: medical, shipping, retail, manufacturing, financial, construction, restaurant, hotel, tourism, other. Then select a random sample of 10 businesses from each business type. What kind of sampling techniques is this?

• Systematic sampling

• Cluster Sampling

• Stratified sampling

• Convenience sampling

A survey of 50 students in Forest Park High school including 10% of these students don’t have breakfast before school.

Identify the population

• 10% breakfast meals

• 10% Forest Park high students

• 50 Forest Park high students

• All Forest Park high students

An environmental advocacy group wants to know how residents intend to vote on a proposal to reduce bus service to certain neighborhoods in the city. They decide to conduct a survey.

Which describes a representative sample of the population for the situation?

• a randomly selected group of members at a local gardening club

• a randomly selected group of residents from the city’s voter registration records

• a randomly selected group of workers at a factory that employs a large percentage of the city

• a randomly selected group of residents in the neighborhoods affected by the proposal

Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?

• thirty students who are often tardy

• thirty students who are rarely tardy

• thirty of her friends

• thirty randomly selected students from her school

Dylan wants to know how the students at his school rate the cafeteria.  He surveyed his school's basketball team to rate the school cafeteria. Is this a biased sample of the school's population?

• Yes, because it is a convenience survey

• No, the basketball team has the smartest students

• Yes, because it's voluntary survey

• No, he should have asked the football team

A school newspaper is going to investigate students' perceptions regarding the campus security guards. They plan to survey 100 students at the school. The editor-in-chief tells his staff that he is worried about undercoverage bias created by chronically truant students. His concern is...

• unwarranted because some students may refuse to participate and that is inevitable.

• justified because chronically truant students will be difficult to survey and will probably have a disproportionately negative view of security guards.

• unwarranted because students who cannot be surveyed are not a part of the population of interest.

• unwarranted because students who cannot be surveyed are not a part of the sample.

• justified because people need to be forced to answer a surey in order for the results to be valid.

If the BCHS Sophomore class is the sample in a statistical study, which is NOT a possible population for the study?

• the student body of BCHS

• the students in the CCPS School District

• The students in our class

• All Sophomore students in the state

I want a representative sample of likely voters. I use a telephone directory to randomly select 200 people. What is the most apparent bias?

• Undercoverage

• Nonresponse

• Response

• Voluntary Response

A nonsampling error occurs when someone gives an incorrect response to a sample survey. What is it called when a systematic pattern of incorrect responses occurs?

• nonresponse

• bias

• response bias

• undercoverage