The following PROC SURVEYSELECT statements select a probability sample of customers from the Customers data set using simple random sampling. title1 'Customer Satisfaction Survey'; proc surveyselect ...
A sample to be representative of a population must be random. In a random sample, the probability of ending up in the sample is the same for each element of a population. An example of a simple random ...
where is the true probability of observing the jth response level in the ith population. The product multinomial distribution is simply the product of two or more individual multinomial distributions ...
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