Question

Difference of two Means. A national testing agency decided to do an experiment to see about the value of using a computer in a mathematics class. One group of students (Group A) used a computer in their class, while another group (Group B) did not. The main variable of interest was a test score, and we want to see if the mean test score for Group A is Larger than Group B. Express the difference as Group A - Group B. Use alpha = .05 for your test. The sample statistics are given below for each group. We can assume the scores for each group are approximately normal. Group A Group B Mean Score 320 302 Standard Deviation 28.7 33.1 N 28 25 Based on the data presented, it is not reasonable to assume the two variances are approximately equal. O True O False

          Difference of two Means. A national testing agency decided to do an experiment to see about the value of using a computer in a mathematics class. One group of students (Group A) used a computer in their class, while another group (Group B) did not. The main variable of interest was a test score, and we want to see if the mean test score for Group A is Larger than Group B. Express the difference as Group A - Group B. Use alpha = .05 for your test.

The sample statistics are given below for each group. We can assume the scores for each group are approximately normal.

Group A	Group B
Mean Score	320	302
Standard Deviation	28.7	33.1
N	28	25

Based on the data presented, it is not reasonable to assume the two variances are approximately equal.

O True
O False

difference of two means a national testing agency decided to do an experiment to see about the value of using a computer in a mathematics class one group of students group a used a computer 94352

Added by Robert F.

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