Find the Critical Value or Values Of $\chi ^ { 2 }$

question 137

Essay

Find the critical value or values of $\chi ^ { 2 }$ based on the given information.
-At the $\alpha = 0.05$ .05 significance level test the claim that a population has a standard deviation of 20.3. A random
sample of 18 people yields a standard deviation of 27.1.