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Sampling, Inference & the t-Test · Question 23 of 70

Which of these is a statistic in the electricity-bill survey?

Question 23

EasyOriginal question

A city has 3,60,000 households, and their monthly electricity bills have a standard deviation of ₹300. A random sample of 900 households has a mean bill of ₹1,850.

Which of these is a statistic in the electricity-bill survey?

Options for question 23

Show the answer and explanation
CorrectNot quiteAnswer A

Correct answer: A

Explanation

  1. A statistic is worked out from the sample; a parameter describes the whole population.

  2. The ₹1,850 comes from the 900 sampled households, so it is a statistic.

Worth noting

The ₹300 describes all the city's bills, so it is a parameter.

Concept
Statistic and parameter
Typical time
90 s
Your time
—
The rule this testsParameters, statistics and the central limit theorem
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