For each of the following, identify the type of sampling method. Then determine
ID: 3255608 • Letter: F
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) (i) Random sampling Technique
(ii) The sample is representing as it represents the population
(Iii) The sample is little biased as the same class might have same type of people who have same number of credit cards
B) (i) Random Sampling Technique
(ii) The data is representative as the friends are a part of the population
(iii) Very biased as he has directes only a small section of society who might be same in nature.
C) (i) Systematic Sampling as the people are being called out using a system.
(ii) The sample is highly representative as it is from the population and represents it
(iii) Very less biased as the position of a person is random.
D) (i) Stratified Sampling as data is collected from section which are formed from the real population
(ii) The sample is representative of the original population
(iii) Not very biased as the sample is collected randomly from each section from the population
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