1. Where X = 1, 3, 5, and 7; Y = 2, 4, 6 and 8 compute X 2 , Y 2 and XY. 2. Rece
ID: 3202882 • Letter: 1
Question
1. Where X = 1, 3, 5, and 7; Y = 2, 4, 6 and 8 compute X2, Y2 and XY.
2. Recent reform efforts in statistics education have identified randomization-based approaches to teaching statistics is effective. Thirty students are randomly assigned to one of two classes: one that uses a randomization-based approach or one that uses a theory-based approach. At the end of eight weeks the students’ performance on a statistics test is recorded. In this scenario which is the independent variable and which is the dependent variable?
Explanation / Answer
1 X Y X2 Y2 XY 1 2 1 4 2 3 4 9 16 12 5 6 25 36 30 X2 = 84 7 8 49 64 56 Y2 = 120 84 120 100 XY = 100 2 Independent variable = X = Approach to teaching statistics (Randomised, Theory based) Dependent Variable = Y = Student's performance on a statistics test
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