Question

Employees at a website want to select a sample of their users to ask for a donation. They randomly select one of
the first 25 user each day and show them a message asking for a donation. They also show the message to every
25th user from that point on.
What type of sample is this?

Answer 1

The answer is systematic random sample

Answer 2

The type of sampling used to select a sample of users to ask for donation is a systematic sampling.

• The systematic sampling could be explained as a form of random sampling which is used to make selection from a larger population by making selection based on a fixed periodic interval.

• In the scenario described above, the employees select every 25th user in their sample, which denotes the sampling interval.

• By picking every 25th user, it shows that the selection is periodic and fixed.

Hence, we can conclude that the employees made use of systematic sampling in their sample selection.

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