Sampling Technique

Which sampling technique involves selecting every nth subject in a population?

• Simple Random Sample

• Stratified

• Cluster

• Systematic

Mrs. Boyd wants to find the average height of all her students in her classes. She decides to use the first 5 people who walk in the door. Is this a good representative sample?

• Yes

• No

What type of sampling?  A journalist asks his family how they feel about water pollution.

• Random sample

• Convenience sample

• Stratified Random sample

• Census

To study the amount of time students spend doing homework each day, use a random number generator to select 25 students from the student enrollment database to survey.

• Convenience Sample

• Simple Random Sample

• Stratified Random Sample

• Interval Sample

To study the amount of time students spend doing homework each day, use a random number generator to select 25 freshmen, 25 sophomores, 25 juniors, and 25 seniors to survey.

• Convenience Sample

• Simple Random Sample

• Stratified Random Sample

• Interval Sample

The school librarian wants to determine how many students use the library on a regular basis.  What type of sampling method would she use if she chose to select every 3rd student who enters the library on Tuesday.

• Convenience Sample only

• Simple Random Sample

• Stratified Random Sample

• Systematic Sample

The school librarian wants to determine how many students use the library on a regular basis.  What type of sampling method would she use if she chose to use a random number generator to randomly select 50 students from the school's attendance roster.

• Convenience Sample

• Simple Random Sample

• Stratified Random Sample

• Interval Sample

The school librarian wants to determine how many students use the library on a regular basis.  What type of sampling method would she use if she chose to randomly select 20 students in the cafeteria during each of the three lunch periods on Monday.

• Convenience Sample

• Simple Random Sample

• Stratified Random Sample

• Interval Sample

What sampling technique is used if Andy uses a drawing of numbers where each number is assigned to a member of a population?

• Convenience

• Simple

• Stratified

• Systematic

Suppose a sample size of 316 is obtained from a population size of 1500. If Nico will use systematic random sampling, at what interval should Nico select the members of the sample?

• 3rd

• 4th

• 5th

• 6th

Answer explanation

Always round off your final answer.