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Sampling, Inference & the t-Test · Question 53 of 70

Question 53

EasyOriginal question

A sample of 49 has standard deviation 14. What is the estimated standard error of the mean?

Options for question 53

Show the answer and explanation
CorrectNot quiteAnswer C

Correct answer: C

Explanation

  1. Standard error =sn= \frac{s}{\sqrt{n}}.

  2. 147=2\frac{14}{7} = 2.

Worth noting

27\frac{2}{7} divides by n=49n = 49 instead of 49=7\sqrt{49} = 7.

Concept
The standard error of the mean
Typical time
60 s
Your time
—
The rule this testsThe one-sample t-test
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