Your list · 0 हिं

Sampling, Inference & the t-Test · Question 20 of 70

Question 20

EasyOriginal question

A population has standard deviation 20. What is the standard error of the mean of a sample of 100?

\frac{1}{5}

Correct answerYour answer

1

Correct answerYour answer

2

Correct answerYour answer

20

Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer C

Correct answer: C

Standard error $= \frac{\sigma}{\sqrt{n}}$ .
$\frac{20}{\sqrt{100}} = \frac{20}{10} = 2$ .

Worth noting

0.2 divides by $n$ instead of $\sqrt{n}$ .

Concept: The standard error of the mean
Typical timeTypical: 60 s
Your timeYours: —

The rule this testsParameters, statistics and the central limit theorem

Practise this chapter →

Ten questions from Sampling, Inference & the t-Test, at your own pace.

Practise this chapter →

Ten questions from Sampling, Inference & the t-Test, at your own pace.

Practise this chapter All 70 questions in Sampling, Inference & the t-Test Revise the notes for Sampling, Inference & the t-Test