Part three:x^2= do we reject?

HW: 9.5 Hypothesis Tests for a Standard Deviation... E Question 4 of 4 (1 point) | Question Attempt: 1 of 3 IQ scores: Scores on an IQ test are normally distributed. A sample of 25 IQ scores had standard deviation s = 8. The developer of the test claims that the population standard deviation is o = 19. Do these data provide sufficient evidence to contradict this claim? Use the a = 0.05 level of significance. Part 1 of 5 State the appropriate null and alternate hypotheses. H :6 19 H :6 # 19 This hypothesis test is a two-tailed test. Part 2 of 5 V Find the critical values. Round the answers to three decimal places. For a = 0.05, the critical values are 12.401 and 39.364