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Q 16.

Expert-verifiedFound in: Page 507

Book edition
6th

Author(s)
Daren Starnes, Josh Tabor

Pages
837 pages

ISBN
9781319113339

How confident? The figure shows the result of taking $25$ SRSs from a Normal population and constructing a confidence interval for the population mean using each sample. Which confidence level—$80\%,90\%,95\%,\mathrm{or}99\%$—do you think was used? Explain your reasoning.

Confidence Level of $99\%$ is used.

We are given that

Confidence Level is calculated as $\frac{25}{25}=1$

$100\%$

- Red line implies those sample means which have no true population mean.
- There are zero samples among given $25$ samples not containing true proportion.
- Hence, $25$ samples from $25$ samples has true population.
- The confidence level which is closest is $99\%$

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