Two different groups of students (freshman and seniors) take a history test to determine their overall knowledge about U. S. History. You are interested if seniors have more knowledge about U. S. History compared to freshman. Treat Seniors as group 1 and Freshmen as Group 2. The data for these two groups are below: Seniors Freshmen
80 79
86 80
89 82
75 81
79 72
96 74
82 89
84 84
91 78
85 90
What is the estimated standard error of the difference?
1.89
-1.89
2.67
-2.67
What is your observed test value? (test statistic)
1.80
1.42
-1.40
2.30
Do you reject or fail to reject your null hypothesis?
Fail to reject the null hypothesis, test statistic is not greater than critical value
Reject the null hypothesis, test statistic is greater than critical value
Fail to Reject the null hypothesis, test statistic is greater than critical value
Reject the null hypothesis, tests statistic is not greater than critical vlaue