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Sampling, Inference & the t-Test · Question 7 of 70

Question 7

EasyOriginal question

A sample of 40 households is to be drawn by systematic sampling from a list of 1,200. What is the sampling interval?

Options for question 7

Show the answer and explanation
CorrectNot quiteAnswer A

Correct answer: A

Explanation

  1. Interval k=Nnk = \frac{N}{n}.

  2. k=1,20040=30k = \frac{1{,}200}{40} = 30: every 30th household after a random start.

Worth noting

40 is the sample size, not the gap between chosen units.

Concept
The sampling interval
Typical time
60 s
Your time
—
The rule this testsPopulation and sample
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