Question

Asked Apr 7, 2019

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Hello, how do you calculate this? Thank You!

Step 1

**Compute the 90% confidence interval for the population mean.**

Since the sample size is small and the population standard deviation is unknown, the 90% confidence interval for the population mean, *μ* (say) is:

Step 2

Here, degrees of freedom*= *15 then* n = *(15+1) =16 and α = 0.1.

*Critical value:*

The critical value is obtained using the Excel formula, “=T.INV.2T(0.1, 15)&rdquo...

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