stats 2 week 11

# stats 2 week 11 - Sarah Anderson Stats 2 Week 11 2. a....

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Sarah Anderson Stats 2 Week 11 2. a. multiple regression analysis b) There is only 1 dependent variable, namely Y and four independent variables, namely X1, X2, X3 and X4. You can see this by noting that if you take another employee, all four X's will change, since they are all properties (qualities) of the individual. But if you know all 4 of these properties, you will be able to calculate Y, so Y depends on X1, X2, X3 and X4. d) Age increasing by one year means adding 1 to X4. So if you call Ya the performance on the machine by a employee A with age X4a and the other variables just X1, X2 and X3 then: Ya = 11.6 + .4*X1 + .286*X2 + .112*X3 + .002*X4a Now if we take another employee, B, with all the same qualities as employee A except that employee B is one year older. Then all the qualities X1, X2 and X3 are both the same for A and B. However: X4b = X4a +1 since B is one year older. Now: Yb= 11.6 + .4*X1 + .286*X2 + .112*X3 + .002*X4b = 11.6 + .4*X1 + .286*X2 + .112*X3 + .002*(X4a + 1) = 11.6 + .4*X1 + .286*X2 + .112*X3 + .002*X4a + .002 = Ya +.002

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## This note was uploaded on 04/12/2011 for the course STAT 2610 taught by Professor Sanjeev during the Spring '11 term at Bemidji State.

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stats 2 week 11 - Sarah Anderson Stats 2 Week 11 2. a....

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