Non-Probability Sampling Practice Worksheet for Students

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www. c k 12 .org Non-probability sampling Worksheet Visit CK12.org for Free Online Practice 1. A researcher plans a study to examine the depth of belief in an afterlife among the adult population of a small town. He obtains a simple random sample of 100 adults as they leave church one Sunday morning. All but one of them agree to participate in the survey. Which of the following is a true statement? a. Proper use of chance as evidenced by the simple random sample makes this a well-designed survey. b. The high response rate makes this a well-designed survey. c. Selection bias makes this a poorly designed survey d. None of these statements is true. 2. The marketing class at a local high school wants to conduct a survey of the opinions of 60 students. Identify the type of sampling method they might use listed below. Marketing class members decide to split students up into groups based on color of clothing, then choose a sample with the same ratio of colors as the whole school. a. Convenience b. Judgment c. Simple Random d. Quota 3. Identify the type of sampling used for the following. Every block of 10 students walking past the classroom where the surveyors are working is exhaustively sampled about their faith in opinion polls. a. Quota Sample b. Volunteer Sample c. Judgment Sample d. Convenience/Random 4. Identify the type of sampling used for the following. Sarah went through a telephone directory and called every person with a name she liked. a. Volunteer Sample b. Convenience/Judgment c. Quota Sample d. None of the above. 2

www. c k 12 .org 5. Do any of the following use simple random sampling? a. Bingo game b. Presidential elections c. US Census d. Opinion Polls 6. The marketing class at a local high school wants to conduct a survey of the opinions of 60 students. Identify the type of sampling method they might use listed below. Number the students in the official school roster. Use a table of random numbers to choose 60 students from this roster for the survey. a. Simple Random b. Judgment c. Convenience d. Quota 7. A marketing company offers $75.00 to the first 100 people who respond to their advertisement in a magazine and complete a questionnaire. This situation is an example of: a. simple random sample b. convenience sample c. voluntary response sample d. multistage cluster sample 8. The marketing class at a local high school wants to conduct a survey of the opinions of 60 students. Identify the type of sampling method they might use listed below. Survey the first 60 students to walk through the doors at school in the morning. a. Convenience b. Quota c. Simple Random d. Judgment 9. Identify the type of sampling used for the following. Four people divided a telephone directory evenly and each called the first 10 numbers they found. 3

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www. c k 12 .org a. Judgment Sample b. Volunteer Sample c. Convenience d. Quota Sample 10. The marketing class at a local high school wants to conduct a survey of the opinions of 60 students. Identify the type of sampling method they might use listed below. Class members discuss who would be most appropriate to survey based on the results they want, then choose those persons. a. Quota b. Convenience c. Judgment d. Snowball/Volunteer 4

www. c k 12 .org Answer Keys 1. Selection bias makes this a poorly designed survey 2. Quota 3. Convenience/Random 4. Convenience/Judgment 5. Bingo game 6. Simple Random 7. voluntary response sample 8. Convenience 9. Convenience 10. Judgment 5

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