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Asked Dec 26, 2019
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In Exercises 9–20, identify which of these types of sampling is used: random, systematic, convenience, stratified, or cluster.

Literary Digest Poll In 1936, Literary Digest magazine mailed questionnaires to 10 million people and obtained 2,266,566 responses. The responses indicated that Alf Landon would win the presidential election. He didn’t.

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Introduction:

Random sampling: It is a probabilistic method of sampling, in which, each population unit is equally likely to be selected into the sample, during a particular selection.

Systematic sampling: It is a probabilistic method of sampling, in which, a constant k is first determined, such that a random number is selected between 1 and k; the population unit corresponding to this number (say, k0) is selected into the sample; thereafter every kth population unit is taken into the sample, till the desired sample size, n is attained. the If the population size, N is known, then k = N/n, or the nearest whole number to the fraction.

Convenience sampling: It is a non-probabilistic method of sampling, in which, data is collected from a section of the population that is most convenient to collect data fr...

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