Tagged Questions

3
votes
1answer
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Issues when data is unavailable when sampling a finite population without replacement

I am specifying a sample of weekly work records to be entered into a spreadsheet for an estimation of means on two variables. There are about 250 employees, I am only interested in weeks between a ...
3
votes
6answers
339 views

Inference to the population when the survey response rate is only 30%

I have conducted a survey in which the questionnaires were sent out to 450 individuals, but only 30% of them answered the questionnaires. Is it still valid to interpret the usual inference analysis ...