Question

The following sample observations were randomly selected:

	1	2	3	4	5
X:	2	13	8	3	2
Y:	18	13	2	24	9

            
a. Not available in Connect.

b. Determine the regression equation.(Negative answer should be indicated by a minus sign. Do not round intermediate calculations. Round the final answers to 4 decimal places.)   

                                        
b =  a =

Y' =  +  X

           
c. Determine the value of Y' whenX is 11. (Do not round intermediate calculations. Round the final answer to 4 decimal places.)

Answer 1

sr	x	y	(x-xbar)^2	(y-ybar)^2	(x-xbar)*(y-ybar)
1	2	18	20.25	14.0625	-16.875
2	13	13	42.25	1.5625	-8.125
3	8	2	2.25	150.0625	-18.375
4	3	24	12.25	95.0625	-34.125
sum	26	57	77	260.75	-77.5
mean	6.5	14.25	SXX	SYY	Sxy
	slope=sxy/sxx	-1.006493506		-52.337662
	intercept=ybar-(slope*xbar)	20.79220779		-31.545455

b=slope=-1.0064

a=intercept = 20.7922

y= a+b*x

y'= 20.7922 - 1.0064*x

c)

put x = 11

y'= 20.7922 - 1.0064*x

y'= 20.7922 - 1.0064*11

y'=9.7218