Question

1) One way to graphically present a bivariate relationship.

A. Pie Graph

B. Scatter diagram

2) A correlation coefficient close to 0 indicates the relationship between the two variables.

A. is very strong

B.   is very weak

3) A correlation of -0.48 is _____ than a correlation of +0.36, whereas a correlation of .79 is _____ than a correlation of -0.25.

A. Stronger, weaker

B. Stronger, stronger

4) The technique used to develop the equation describing the relationship between two variables.

A. Regression analysis

B. Most squares method

5) The change is Y in response to a change in X represents the

A.  The intercept

B. Sum of squares

C. Slope

Answer 1

1) One way to graphically present a bivariate relationship : Scatter diagram

[ in scatter diagram, we plot the data in (x,y) format...this diagram is used to represent the relationship between two variable X and Y]

2) A correlation coefficient close to 0 indicates the relationship between the two variables: is very weak

[ r = 1..indicates a strong relationship...and r=0, indicates a weak relationship]

3) A correlation of -0.48 is _____ than a correlation of +0.36, whereas a correlation of .79 is _____ than a correlation of -0.25 is:-

Stronger, stronger (B)

[ we know that , more the absolute value of r, stronger is the relationship.

]

4) The technique used to develop the equation describing the relationship between two variables: Regression analysis

[ there is no method named most square method...rather a method is used is least square method]

5) The change is Y in response to a change in X represents : The slope

[ for each 1 unit increase in X  the rate of change in y is known as slope]

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