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Sampling, Inference & the t-Test · Question 39 of 70

Question 39

EasyOriginal question

A school claims its students sleep 7 hours a night on average. A researcher tests the claim. What is the null hypothesis?

Options for question 39

Show the answer and explanation
CorrectNot quiteAnswer B

Correct answer: B

Explanation

  1. The null hypothesis states the claim, with no difference: the population mean equals 7.

  2. So H0:μ=7H_0: \mu = 7.

Worth noting

xˉ=7\bar{x} = 7 is about the sample; hypotheses are about the population mean μ\mu.

Concept
Writing the null hypothesis
Typical time
60 s
Your time
—
The rule this testsNull and alternate hypotheses
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Ten questions from Sampling, Inference & the t-Test, at your own pace.

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