Question

Determine the critical values for the confidence interval for the population standard deviation from the given values. Round your answers to three decimal places. n=15 and α=0.05.

Answer 1

We have given,              
              
Sample size =n=15      
Degree of freedom =n-1=15-1=14  
Level of significance=1-0.95=0.05      
              
by using chi square critical value table or Excel =CHIINV(1-(0.05/2),14)
by using chi square critical value table or Excel =CHIINV((0.05/2),14)