• A teacher wishes two methods of teaching verbs to his English class.  He has divided the class randomly into two samples of 14 students each. Using Method 1, the students learn an average of 43.8 with a standard deviation of 4.6, while the second group (Method 2) got an average of 38.6 with a standard deviation of 5. Thus method 1 is superior than method 2. Test using 0.01 level of significance.