Question

a. A line has an intercept of 9 and a slope of 5.4. When x is 10, what is y?_________

b.

A line is given as y = 44 + 9.2 x

If x increases by 2 units, y increases by ___

(if y decreases, the answer should be a negative number)

(provide one decimal place)_______

c.

A regression analysis states that R-squared = 0.86. Which of these is correct?

		86% of the variability in the response variable is due to the variability in explanatory variables
		If the explanatory variable increases by one unit, the response variable increases by 0.86
		If H0 is right, then the likelihood of getting data as observed or more extreme is 86%
		If the F-statistic exceeds 0.86, then the model is significant

d.  

he output of a regression analysis found the slope to be 3.86, intercept to be 3.64, correlation coefficient to be 0.68, and coefficient of determination to be 0.46. Match the following:

-       A.       B.       C.       D.       E.       F.       G.	estimated line
-       A.       B.       C.       D.       E.       F.       G.	If x increases by one unit, y increases by ___ units
-       A.       B.       C.       D.       E.       F.       G.	Percentage of variability of y explained by x is
-       A.       B.       C.       D.       E.       F.       G.	When x is 10, the regression line estimates y to be ___

\\\\\\\

A.	46
B.	42.24
C.	68
D.	3.86
E.	3.64
F.
G.

Answer 1