Answer:
We want a confidence of 99% so then the significance level would be 1%
The degrees of freedom are given by:
And the critical value using the significance level and and the critical value would be:
Step-by-step explanation:
We know the following info :
represent the standard deviation from the sample
represent the sample size selected
We want a confidence of 99% so then the significance level would be 1%
The degrees of freedom are given by:
And the critical value using the significance level and and the critical value would be: