PRR 475, Exercise B1 : Questionnaire Design
a. SIMPLE RANDOM SAMPLE (SRS): First generate a simple random sample using any random process for choosing hours. (e.g. put 31 numbered slips of paper in one envelope for the day of the month and 12 numbered slips for the hour. Choose one slip from each envelope to get the day and time for each period to be sampled. ................
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