Five observations taken for two variables follow.

	4	6	12	4	14
	50	50	40	50	30

a. Which of the following scatter diagrams accurately represents the data set?

A.		B.
C.		D.

- Select your answer -ABCDItem 1

b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables?

- Select your answer -The relationship is positive.The relationship is negative.Item 2

c. Compute the sample covariance (to decimal and enter negative value as negative figure).

Interpret the sample covariance.

- Select your answer -The positive value of the sample covariance indicates a positive linear relationship.The positive value of the sample covariance indicates a negative linear relationship.The negative value of the sample covariance indicates a negative linear relationship.The negative value of the sample covariance indicates a positive linear relationship.There is neither a positive nor a negative linear relationship.Item 4

d. Compute the sample correlation coefficient (to decimals and enter negative value as negative figure).

Interpret the sample correlation coefficient. Hint: If the correlation coefficient is greater than 0.80 or less than -0.80, there is a strong relationship.

- Select your answer -There is a strong positive linear relationship.There is a moderate positive linear relationship.There is neither a positive nor a negative linear relationship.There is a strong negative linear relationship.There is a moderate negative linear relationship.Item