2 Questions
| Total Attempts: 355

Questions and Answers

- 1.For the following data set (8) :height is the x variableweight is the y variableWhich of the following statements are true?
- A.
The direction is linear

- B.
The Correlation Coefficient is 0.72

- C.
The Coefficient of Determination is 52%

- D.
The generic equation for the line is : y=-131+1.10x

- E.
The value of b is : 1.10

- F.
The specific equation for the line is height= -131+1.10 x weight

- G.
Weight will increase by 1.10kg for every increase of 1cm in height

- H.
When weight is zero, height will be 131cm

- 2.For the following data set (1) :The x variable is the number of weeks trainingThe y variable is the number of pushups completedSelect all the answers which are accurate :
- A.
The form is positive

- B.
The Correlation Coefficient is 0.996

- C.
The Coefficient of Determination is 99.1%

- D.
The generic equation for the line is : y=10.1+2.1x

- E.
The residual plot shows the data is non linear

- F.
The specific equation for the line is : number of weeks training =10.1+2.1 x number of pushups completed

- G.
The y intercept indicates 10 pushups were completed before training commenced

- H.
99% of the variation in pushups completed can be explained by the number of weeks spent training.

- 3.For the following data set (2) :The x variable is the result for Test AThe y variable is the result for Test B
- A.
The strength is positive

- B.
The Correlation Coefficient is 0.92

- C.
The Coefficient of Determination is 86%

- D.
The generic equation for the line is : y=20.63+0.62x

- E.
The value of a is : 10.152

- F.
The specific equation for the line is : Results for Test B =20.63+0.62 x Results for Test A

- G.
The residual plot shows a pattern indicating the relationship is non linear

- H.
86% of the variation in Test B results can be explained by the variation in Test A results

- 4.For the following data set (4) :The x variable is the result for Test AThe y variable is the result for Test B
- A.
The form is positive

- B.
The Correlation Coefficient is 0.248

- C.
The Coefficient of Determination is 61.5%

- D.
The generic equation for the line is : y=48.9+0.17x

- E.
The value of a is : 48.90

- F.
The residual for a score of 51 on test A is approximately 2.

- G.
The residual plot is random showing the relationship is linear

- H.
61.5% of the variation in Test B results can be explained by the variation in Test A results

- 5.