A consultant claims that the variance of the GRE test scores is greater than 10. To verify the claim, a random sample of 25 scores of students taking the GRE test showed a variance of 12 points. (=0.05?)

a) Formulate the hypotheses.

B)at a 95% confidence, calculate the test statistics (chi-square value) and test the hypotheses (round the first decimal). What are critical values? What is the conclusion?

C)Following the information in Question 1a, develop the 95% interval estimate of the variance for the GRE scores. Please round to the second decimal place.