For each of the following, identify the type of sampling method. Then determine

Question

For each of the following, identify the type of sampling method. Then determine whether the sample is representative, or biased. Explain why.

a. A professor in an accounting class surveys all of the students in his class to obtain sample data

consisting of the number of credit cards they own.         

b. A vegan (someone who eats no meat, or animal products) wants to find out how many people drink milk (an animal product) with breakfast. He asks a random sample of his friends and associates.   

c. A college fundraising campaign calls every 100th name on an alphabetical list of alumni.   

d. A marketing expert surveys 250 randomly selected people from each of the age groups 10-­19, 20-­29 and 30-­39.   

Explanation / Answer

a.) Simple random sampling

Sample is representative

b.) Simple random sampling

Sample is representative

c.) Systematic Sampling

Sample is representative

d.) Cluster sampling

Sample is representative

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