Test the slope of the regression line, ŷ = -46.292 + 15.240 x of the following...
Test the slope of the regression line, ŷ = -46.292 + 15.240 x of the following data.
| Advertising | Sales |
| 12.5 | 148 |
| 3.7 | 55 |
| 21.6 | 338 |
| 60.0 | 994 |
| 37.6 | 541 |
| 6.1 | 89 |
| 16.8 | 126 |
| 41.2 | 379 |
(Round the intermediate values to 3 decimal places.
Round your answer to 2 decimal places.)
Observed t=
The decision is to
Homework Answers
t test statistic for slope =7.27
P value =0.0003
The decision is to reject H0
Therefore, we can say that linear relationship exist between two variables.
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Test the slope of the regression line, ŷ = -46.292 + 15.240 x
of the following...
A corporation owns several companies. The strategic planner for the corporation believes dollars spent on advertising...
A corporation owns several companies. The strategic planner for the corporation believes dollars spent on advertising can to some extent be a predictor of total sales dollars. As an aid in long-term planning, she gathers the following sales and advertising information from several of the companies for 2016 ($ millions). Advertising Sales 12.5 148 3.7 55 21.6 338 60.0 994 37.6 541 6.1 89 16.8 126 41.2 379 Develop the equation of the simple regression line to predict sales from...
A corporation owns several companies. The strategic planner for the corporation believes dollars spent on advertising...
A corporation owns several companies. The strategic planner for the corporation believes dollars spent on advertising can to some extent be a predictor of total sales dollars. As an aid in long-term planning, she gathers the following sales and advertising information from several of the companies for 2011 ($ millions). Determine the SSE and the se by using y= -46.29 + 15.24 x. Think about the variables being analyzed by regression in this problem and comment on the value of...
A corporation owns several companies. The strategic planner for the corporation believes dollars spent on advertising...
A corporation owns several companies. The strategic planner for the corporation believes dollars spent on advertising can to some extent be a predictor of total sales dollars. As an aid in long-term planning, she gathers the following sales and advertising information from several of the companies for 2017 (in millions). Advertising Sales 12.5 139 3.7 55 20.2 338 60.0 994 37.6 538 6.1 89 15.8 126 41.2 379 Construct a 98% confidence interval for the average value of y for...
Test the slope of the regression line for the following data. Use x 140 116 105...
Test the slope of the regression line for the following data. Use x 140 116 105 89 67 30 25 y 26 28 46 68 85 113 128 (Do not round the intermediate values. Round your answer to 2 decimal places.) 1. Observed t = 2. The decision is to reject the null hypothesis or fail to reject the null hypothesis?
An article gave a scatter plot along with the least squares line of x = rainfall...
An article gave a scatter plot
along with the least squares line of x = rainfall volume
(m3) and y = runoff volume (m3) for
a particular location. The accompanying values were read from the
plot.
x
5
12
14
20
23
30
40
51
55
67
72
85
96
112
127
y
4
10
13
15
15
25
27
45
38
46
53
75
82
99
103
(a) Does a scatter plot of the data support the use of...
Part a) Compute the regression line for these data, and provide your estimates of the slope...
Part a)
Compute the regression line for these data, and provide your
estimates of the slope and intercept parameters. Please round
intermediate results to 6 decimal places.
Slope:
Intercept:
Note: For sub-parts below, use the slope and intercept
values in Part a, corrected to 3 decimal places to calculate
answers by hand using a scientific calculator.
Part b)
Based on the regression model, what level of horsepower would you
expect the engine to produce if running at 24002400 rpm?
Answer:...
An artide gave a scatter plot along with the least squares line of x -rainfall volume (m3) and y ...
An artide gave a scatter plot along with the least squares line of x -rainfall volume (m3) and y runoff volume (m3) for a particular location. The accompanying values were read from the plot. x14 12 14 17 23 30 40 52 55 67 72 85 96 112 127 y14 10 13 15 15 25 27 45 38 46 53 71 82 99 100 (a) Does a scatter plot of the data support the use of the simple linear regression...
An article gave a scatter plot along with the least squares line of x = rainfall...
An article gave a scatter plot along with the least squares line of x = rainfall volume (m3) and y = runoff volume (m2) for a particular location. The accompanying values were read from the plot. x 6 12 14 16 23 30 40 51 55 67 72 84 96 112 127 y 4 10 13 14 15 25 27 45 38 46 53 75 82 99 102 (a) Does a scatter plot of the data support the use of...
An article gave a scatter plot along with the least squares line of x = rainfall...
An article gave a scatter plot along with the least squares line of x = rainfall volume (mº) and y = runoff volume (m3) for a particular location. The accompanying values were read from the plot. x 4 12 14 16 23 30 40 51 55 67 72 80 96 112 127 y 4 10 13 46 53 72 82 99 15 15 25 27 44 38 103 in USE SALT (a) Does a scatter plot of the data support...
An article gave a scatter plot along with the least squares line of x = rainfall...
An article gave a scatter plot along with the least squares line of x = rainfall volume (m3) and y = runoff volume (m3) for a particular location. The accompanying values were read from the plot. х 4 12 14 17 23 30 40 48 55 67 72 81 96 112 127 y 4 10 13 14 15 25 27 44 38 46 53 70 82 99 104 (a) Does a scatter plot of the data support the use of...
A corporation owns several companies. The strategic planner for the corporation believes dollars spent on advertising can to some extent be a predictor of total sales dollars. As an aid in long-term planning, she gathers the following sales and advertising information from several of the companies for 2011 ($ millions). Determine the SSE and the se by using y= -46.29 + 15.24 x. Think about the variables being analyzed by regression in this problem and comment on the value of...
An article gave a scatter plot
along with the least squares line of x = rainfall volume
(m3) and y = runoff volume (m3) for
a particular location. The accompanying values were read from the
plot.
x
5
12
14
20
23
30
40
51
55
67
72
85
96
112
127
y
4
10
13
15
15
25
27
45
38
46
53
75
82
99
103
(a) Does a scatter plot of the data support the use of...
Part a)
Compute the regression line for these data, and provide your
estimates of the slope and intercept parameters. Please round
intermediate results to 6 decimal places.
Slope:
Intercept:
Note: For sub-parts below, use the slope and intercept
values in Part a, corrected to 3 decimal places to calculate
answers by hand using a scientific calculator.
Part b)
Based on the regression model, what level of horsepower would you
expect the engine to produce if running at 24002400 rpm?
Answer:...
An artide gave a scatter plot along with the least squares line of x -rainfall volume (m3) and y runoff volume (m3) for a particular location. The accompanying values were read from the plot. x14 12 14 17 23 30 40 52 55 67 72 85 96 112 127 y14 10 13 15 15 25 27 45 38 46 53 71 82 99 100 (a) Does a scatter plot of the data support the use of the simple linear regression...
An article gave a scatter plot along with the least squares line of x = rainfall volume (m3) and y = runoff volume (m2) for a particular location. The accompanying values were read from the plot. x 6 12 14 16 23 30 40 51 55 67 72 84 96 112 127 y 4 10 13 14 15 25 27 45 38 46 53 75 82 99 102 (a) Does a scatter plot of the data support the use of...
An article gave a scatter plot along with the least squares line of x = rainfall volume (mº) and y = runoff volume (m3) for a particular location. The accompanying values were read from the plot. x 4 12 14 16 23 30 40 51 55 67 72 80 96 112 127 y 4 10 13 46 53 72 82 99 15 15 25 27 44 38 103 in USE SALT (a) Does a scatter plot of the data support...
An article gave a scatter plot along with the least squares line of x = rainfall volume (m3) and y = runoff volume (m3) for a particular location. The accompanying values were read from the plot. х 4 12 14 17 23 30 40 48 55 67 72 81 96 112 127 y 4 10 13 14 15 25 27 44 38 46 53 70 82 99 104 (a) Does a scatter plot of the data support the use of...
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