For this problem we are assuming that the confidence level is 99% or 0.99, then the significance level would be then the value of and the degrees of freddom are given by:
Then the critical values for this case are:
Step-by-step explanation:
For this problem we are assuming that the confidence level is 99% or 0.99, then the significance level would be then the value of and the degrees of freddom are given by: