Test Hypotheses Regarding Two Population Standard Deviations
-An Algebra Teacher $\alpha = 0.01$

Short Answer

Test Hypotheses Regarding Two Population Standard Deviations
-An algebra teacher believes that the variances of test scores of students in her evening algebra class are lower than the variances of test scores of students in her morning class. The results of an exam, given to the morning and evening students, are shown below. Can the teacher conclude that her evening students have a lower variance? Use $\alpha = 0.01$ .


Assume the samples were randomly selected from normal populations.