刘同学2018-05-22 12:37:37

Using the above data, an analyst is trying to test the null hypothesis that the population variances are equal（） against the alternative hypothesis that the variances are not equal （）at the 5% level of significance. The following table provides the F-distribution. Which of the following statements is most appropriate? The critical value is: A 9.60 and do not reject the null. B 7.15 and do not reject the null. C 6.39 and reject the null. 老师这种题是否需要掌握？