f. The value of linear correlation coefficient r is i. 0.948 ii. 0.974 iii. -0.948 iv. -0.974 g.Based on your answer in part (f), the linear dependance between weekly exercise time and change in cholesterol level is strong negative i. True ii. False H. When weekly exercise time is 460 minutes (approximately 66 minutes per day), the 95 percent confidence interval for change in cholesterol level is (197.3, 225.4). This means that: i. If one person exercises 460 minutes per week, his/hers change in cholesterol level will be between 197.3 and 225.4 with 95 percent certainty. ii. If several people exercise 460 minutes per week, their average change in choles- terol level will be between 197.3 and 225.4 with 95 percent certainty.   I. When weekly exercise time is 460 minutes (approximately 66 minutes per day), the 95 percent prediction interval for change in cholesterol level is (155.1, 267.6). This means that i. If one person exercises 460 minutes per week, his/hers change in cholesterol level will be between 155.1 and 267.6 with 95 percent certainty. ii. If several people exercise 460 minutes per week, their average change in choles- terol level will be between 155.1 and 267.6 with 95 percent certainty.

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This is a continuation of the last question I posted:

 

f. The value of linear correlation coefficient r is

i. 0.948

ii. 0.974

iii. -0.948

iv. -0.974

g.Based on your answer in part (f), the linear dependance between weekly exercise time and change in cholesterol level is strong negative

i. True

ii. False

H. When weekly exercise time is 460 minutes (approximately 66 minutes per day), the 95 percent confidence interval for change in cholesterol level is (197.3, 225.4). This means that:

i. If one person exercises 460 minutes per week, his/hers change in cholesterol level will be between 197.3 and 225.4 with 95 percent certainty.
ii. If several people exercise 460 minutes per week, their average change in choles- terol level will be between 197.3 and 225.4 with 95 percent certainty.

 

I. When weekly exercise time is 460 minutes (approximately 66 minutes per day), the 95 percent prediction interval for change in cholesterol level is (155.1, 267.6). This means that

i. If one person exercises 460 minutes per week, his/hers change in cholesterol level will be between 155.1 and 267.6 with 95 percent certainty.

ii. If several people exercise 460 minutes per week, their average change in choles- terol level will be between 155.1 and 267.6 with 95 percent certainty.

300
200
100
-100
-200
100
200
300
400
500
Exercise Time
Figure 1: Scatter plot and fitted regression line
Coefficients"
Standardized
Coefficients
Unstandardized Coefficients
Model
B
Std. Error
Beta
Sig.
1
(Constant)
-239.772
10.130
-23.669
.000
ExerciseTime
.981
.033
.974
29.609
.000
a. Dependent Variable: Change
Figure 2: Estimated regression coefficients
Change
Transcribed Image Text:300 200 100 -100 -200 100 200 300 400 500 Exercise Time Figure 1: Scatter plot and fitted regression line Coefficients" Standardized Coefficients Unstandardized Coefficients Model B Std. Error Beta Sig. 1 (Constant) -239.772 10.130 -23.669 .000 ExerciseTime .981 .033 .974 29.609 .000 a. Dependent Variable: Change Figure 2: Estimated regression coefficients Change
ANOVAª
Sum of
Squares
Model
df
Mean Square
F
Sig.
Regression 642950.535
1 642950.535 876.722
.000b
1
Residual
35201.145
48
733.357
Total
678151.680
49
a. Dependent Variable: Change
b. Predictors: (Constant), ExerciseTime
Figure 3: Analysis of Variance
Transcribed Image Text:ANOVAª Sum of Squares Model df Mean Square F Sig. Regression 642950.535 1 642950.535 876.722 .000b 1 Residual 35201.145 48 733.357 Total 678151.680 49 a. Dependent Variable: Change b. Predictors: (Constant), ExerciseTime Figure 3: Analysis of Variance
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