Consider the following data for two variables, x and y.
x
22
24
26
30
35
40
y
11
20
33
34
39
36
(a)
Develop an estimated regression equation for the data of the form
ŷ = b0 + b1x.
(Round b0 to one decimal place and b1 to three decimal places.)ŷ =
−8.3+1.259x
(b)
Use the results from part (a) to test for a significant relationship between x and y. Use α = 0.05.
Find the...
Consider the following data for two variables, x and y.
x 2 3 4 5 7 7 7 8 9
y 4 5 4 6 4 6 9 5 11
a. Does there appear to be a linear relationship between x and y? Explain.(f-test, to do f-test for the overall significance)
b. Develop the estimated regression equation relating x and y.
c. Plot the standardized residuals versus yˆ for the estimated regression equation developed in part (b). Do the model assumptions...
Consider the following data on x and y shown in the table
below,
x
2
4
7
10
12
15
18
20
21
25
y
5
10
12
22
25
27
39
50
47
65
Fit the model E(y)=β0+β1x to the data, and plot
the residuals versus x for the model on Minitab. Do you detect any
trends? If so, what does the pattern suggest about the model?
A statistical program is recommended.
Consider the following data for two variables, x and
y.
x
22
24
26
30
35
40
y
12
20
33
35
40
36
(a) Develop an estimated regression equation for the data of the
form
ŷ = b0 +
b1x. (Round
b0 to one decimal place and
b1 to three decimal places.
ŷ =
(b) Use the results from part (a) to test for a significant
relationship between x and y. Use α =
0.05....
A statistical program is recommended.
Consider the following data for two variables, x and
y.
x
9
32
18
15
26
y
11
20
22
17
22
(a) Develop an estimated regression equation for the data of the
form ŷ = b0 +
b1x. (Round
b0 to two decimal places and
b1 to three decimal places.)
ŷ =
Comment on the adequacy of this equation for predicting
y. (Use α = 0.05.)
The high p-value and low coefficient of determination...
A statistical program is recommended.
Consider the following data for two variables, x and
y.
x
9
32
18
15
26
y
9
20
22
16
23
(a)Develop an estimated regression equation for the data of the
form ŷ = b0 + b1x. (Round
b0 to two decimal places and
b1 to three decimal places.)
(b) Develop an estimated regression equation for the data of the
form ŷ = b0 + b1x +
b2x2. (Round b0 to two
decimal places...
A statistical program is recommended.
Consider the following data for two variables, x and
y.
x
22
24
26
30
35
40
y
12
20
32
36
39
36
(a). Develop an estimated regression equation for the data of
the form
ŷ = b0 + b1x.
(b). Use the results from part (a) to test for a significant
relationship between x and y. Use α = 0.05.
Find the value of the test statistic.
Find the p-value.
Is the relationship...
Consider the following data on x = weight (pounds) and
y = price ($) for 10 road-racing bikes.
Brand
Weight
Price ($)
A
17.8
2,100
B
16.1
6,250
C
14.9
8,370
D
15.9
6,200
E
17.2
4,000
F
13.1
8,500
G
16.2
6,000
H
17.1
2,580
I
17.6
3,500
J
14.1
8,000
These data provided the estimated regression equation
ŷ = 28,243 − 1,418x.
For these data, SSE = 7,368,713.71 and SST = 51,100,800. Use the
F test to determine...
Consider the following data for two variables, x and y.
x
10
34
20
11
24
y
11
30
22
19
21
a. Develop an estimated regression equation for
the data of the form y=b0+b1x. Comment on the
adequacy of this equation for predicting . Enter negative value as
negative number.
The regression equation is
Y=___________+___________ (to 2 decimals)
s=__________ (to 3 decimals)
r2=_________% (to 1 decimal)
r2 adj=_______ % (to 1 decimal)
Analysis of Variance
SOURCE
DF
SS
(to...
Consider the following data for two variables, x and
y.
x
9
32
18
15
26
y
10
19
22
17
23
(a) Develop an estimated regression equation for the data of the
form ŷ = b0 +
b1x. (Round
b0 to two decimal places and
b1 to three decimal places.)
ŷ =
Comment on the adequacy of this equation for predicting
y. (Use α = 0.05.)
The high p-value and low coefficient of determination
indicate that the equation is...