Valid Samples Test Practice

Which element of the sampling process will

produce the most valid sampling results?

• Representative sampling

• Random sampling

• Appropriate sample size for the size of the population

• All of the above are required to obtain valid results

Which method is the best way to make sure the

sample used for a survey is a representative sample of the population?

• Choosing participants at random

• Choosing participants that the surveyor knows

  personally

• Choosing participants with similar hobbies and

  interests as the surveyor

• All of the above will produce a representative sample

Keri attends the local middle school and wants to know which end-of-the-year celebration activity the 7th grade class would prefer. She decides she will randomly draw the names of 50 seventh graders and ask their opinion.

Which group of students represents the population of Keri’s sampling situation?

• The 50 seventh graders selected to participate in the

  survey

• All 7th grade students at the middle school

• All students at the middle school

• All faculty, staff, and students at the middle school

Keri attends the local middle school and wants to know which end-of-the-year celebration activity the 7th grade class would prefer. She decides she will randomly draw the names of 50 seventh graders and ask their opinion.

Which group of students represents the sample of Keri’s sampling situation?

• The 50 seventh graders selected to participate in the

  survey

• All 7th grade students at the middle school

• All students at the middle school

• All faculty, staff, and students at the middle school

Ted’s class is assigned to conduct surveys to determine the most popular elective class.

Ted chooses to survey his 10 closest friends to complete this assignment.

This sampling method will most likely produce which type of results?

• Valid results

• Representative results

• Biased results

• Random results

David is the activities coordinator for the local YMCA.

He wants to know which new class would be most preferred by the current YMCA members.

Which is the best sampling method for David to obtain valid results?

• Surveying every 3rd customer that enters the grocery

  store across the street from the YMCA

• Posting a survey to the town’s social media site asking

  anyone to participate

• Calling every 5th member in the YMCA’s membership

  records and asking their opinion

• All of the above will produce valid results

Millie plans to survey her fellow middle school students to determine the most popular school lunch.

Her middle school has 600 total students.

She will draw the names of 10 students at random and record their lunch preferences.

Which change, if any, should Millie make to her sampling method in order to get the most valid results?

• Millie should make the sample more random

• Millie should increase the sample size

• Millie should choose a different method of selecting

  students

• Millie should not change anything about her method

Kevin is running for city council member.

He wants to know if he has a good chance of winning the position so he decides to poll every 4th person at his church this coming Sunday.

Which change, if any, should Kevin make to his sampling method in order to get the most valid results?

• Kevin should not change anything about his method

• Kevin should increase his sample size

• Kevin should make his selection process more

  randomized

• Kevin should poll in more places of the community in

  order to get a better representation of voters