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Which of the following yields a stratified sample? a.All students in a class are divided into groups of 15. One student is randomly chosen from
Which of the following yields a stratified sample?
a.All students in a class are divided into groups of 15. One student is randomly chosen from the first group, the remaining observations are every 15th student thereafter. | |||||
b.The best 15 students, according to the opinion of the instructor, in a class are selected. | |||||
c.All students in a class are grouped according to their gender. A random sample of 8 is selected from the males and a separate random sample of 7 is drawn from the females. | |||||
d,\. The first 15 students in a class are selected without replacement.
Which of the following yields a simple random sample?
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