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Below in green is the data given for this exercise. The questions are in red, and my answers are in blue. Could you please review
Below in green is the data given for this exercise. The questions are in red, and my answers are in blue. Could you please review and tell me if I am right or wrong? Prediction: X (X Prime) from Y x = 200, y = 350, Sx= 75, Sy - 100, fay = 0.46 Box A: mean plus 2 standard deviations, B: mean of the variable on vertical axis, C: mean minus one standard deviation. D: mean minus 2 standard deviations, E: mean, F: mean plus 2 standard deviations. Question 1: What values do you put in the letter boxes: A: 350, B: 200, C: 50, D: 150, E: 350, F: 550 Question 2: Find the regression line equation. X= a + by First confusion: Is b the same as r7 Or do I use the formula b = r(as/sy) or do I use b = (sy/sx)? I tried b = r(ex/x) =0.46(75/100) =0.345 a= x - b(9) =200 - 0.345(350) =79.25 so the line would be X = 79.25 + 0.345(Y) Please revise this second question because I have the feeling it is all wrong. Question 4: Looking at your first predicted point (left most point) what is the given value and the predicted value? I guess the given value is 150 and the predicted value is what results from X-79.25+0.345(150)
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