SOLUTION: if n = 13, x̄ = 40, and s = 13, construct a confidence interval at a 99% confidence level. Assume that the data came from a normally distributed population. Answer to 3 decimals

Question 1182875: if n = 13, x̄ = 40, and s = 13, construct a confidence interval at a 99% confidence level.
Assume that the data came from a normally distributed population.
Answer to 3 decimals
Answer by Edwin McCravy(20065) (Show Source): You can put this solution on YOUR website!


Use your TI-84 calculator

press stat, highlight TESTS, then press 8

If your calculator is not too old, you will see a screen that you can
make read like this:

            TInterval
     Inpt:Data Stats 
     x̄:40
     Sx:13
     n:13 
     C-Level:0.99
     Calculate

Scroll down to highlight Calculate then press enter.

You will see this screen:

            TInterval     
     (28.987,51.013)
     x̄=40
     Sx=13
     n=13

The confidence interval is 28.987 < μ < 51.013

Edwin

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