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yashar806Best ResponseYou've already chosen the best response.0
can you explain that?
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
its about statistics
 one year ago

JuanitaMBest ResponseYou've already chosen the best response.0
yes let me see how I want to explain it
 one year ago

JamesJBest ResponseYou've already chosen the best response.1
The second part is asking you for the value of R^2. Sounds familiar?
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
ow ` I just have to square it ?
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
what if it asks The Buick Regal has a horsepower of 127. What is the predicted mileage for the Buick Regal?
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
i have to plug 127 into function?
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
what about this one Predicting the value of a response variable for an individual whose xvalue is out of our range of data is called
 one year ago

JamesJBest ResponseYou've already chosen the best response.1
Then you can still use the regression line to derive an predicted value for y, given the x. However, it is likely to be less reliable for an x outside the range of x in the original sample, particularly if it is a long way outside of that range.
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
so how should I answer this question ?
 one year ago

JamesJBest ResponseYou've already chosen the best response.1
I'm guessing just use your regression line if it asking you for an actual predicted y value
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
Im sorry, I dont get it
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
is it going to be extrapolation
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
I think it asking for definition of extrapolation
 one year ago

JamesJBest ResponseYou've already chosen the best response.1
Well, that's why you have a textbook. Look it up.
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
so, my last question is What is the residual for the Chevy Malibu?
 one year ago

JamesJBest ResponseYou've already chosen the best response.1
Residual is the difference between the predicted and actual value. So calculate the predicted value and compare it to the actual.
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
So, I have to plug 251 and 28 into fuction?
 one year ago

JamesJBest ResponseYou've already chosen the best response.1
No. You are predicting one variable in terms of the other, using the regression line. You are predicting the value of y, given x. You are predicting the value of mileage as a function of horsepower. That gives you the predicted value of mileage. The residual is then the difference between this predicted number and the actual mileage. These are fundamental concepts. I recommend you go back and reread your lecture notes and/or the chapter in your text book to make sure you have this straight.
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
I got the answer for that 2.1380
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
could you expalin this one?
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
Suppose we had instead measured mileage in kilometers per liter (1 m/g = 0.425 km/l). What would be the value of the correlation between X and Y?
 one year ago

phiBest ResponseYou've already chosen the best response.0
to change from mile per gallon to km per liter you would multiply each mileage value by a conversion factor (a fixed number). call that number a. If you plug in that factor everywhere into your formula how does it change the final correlation ?
 one year ago

phiBest ResponseYou've already chosen the best response.0
yes, it stays the same. But you can prove it to yourself.
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
but when I enter the answer 0.8651 . it says , it's wrong
 one year ago

yashar806Best ResponseYou've already chosen the best response.0
now ,its right , thank you very much
 one year ago
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