Identify a method whereby a random sample can be selected from the population.Denis is interested in the opinions of students at his university regarding life after death. He would like to obtain a random sample of 30 students from the university. The students in the sample will be asked how they feel about life after death.
A. He writes each letter of the alphabet on a slip of paper. All slips of paper are the same size and shape. He folds the slips of paper, puts them in a box and mixes them thoroughly. Without looking, he selects a slip from the box and looks at the letter on the slip. From an alphabetical listing of names of all students at the university, he chooses the first 30 students whose names begin with the selected letter.
B. He obtains an alphabetical listing of names of all students at the university. He obtains a sample of 30 students by choosing every 100th name from the list until he has a sample of 30.
C. He chooses every 50th student who leaves the library until he has a sample of 30.
Answer: B
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?
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?
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