Mathematics, 26.02.2020 01:26 thesleepycat

What are the requirements that must be satisfied for a sample to be random? Check all that apply. a. Each individual has an equal chance of being selected. b. The proportions of all subgroups in the sample are equal to their proportions in the population. c. If more than one individual is selected, the probabilities stay constant for each individual selected. d. The sample is drawn without replacement.

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