The Dow Jones Industrial Average varies as investors buy and sell shares of the 30 stocks that make up the average. Samples of the Dow Jones Industrial Average taken at different times during the first five days of November and the first five days of December in the same year are as follows.

November 7493 7525 7760 7499 7555 7690 7668 7600 7516 7711

December80668209 7842 7943 7846 8071 8055 8159 7828 8109

Use a 0.05 level of significance and test to determine whether the population variances for the two time periods are equal. Use both the p-value and critical value approaches.