Question

game thory

,hst the cofficien of ltemination cqual? A) 0.1945 B) 0.4225 C) 0.5778 D) 0.8061 45. The hypothesis to test the slope of a regression equation is Ho: a 0 TRUE FALSE 46. The least squares technique minimizes the sum of the squares of the vertical distances between the actual Y values and the predicted values of Y TRUE FALSE 47. The regression equation is used to estimate a value of the dependent variable Y based ona selected value of the independent variable X. TRUE FALSE 48. What is the chart called when the paired data (the dependent and independent variables) are plotted? A) A scatter diagram B) A bar chart C) A pie chart D) A histogram 49. The strength of the correlation between two variables depends on the sign o coefficient of correlation TRUE FALSE 50. In regression analysis, what is the predictor variable called A) Independent variable B) Dependent variable C) Correlation variable D) Variable of determination 8页共8页

Answer 1

(44) (B)

Coefficient of determination = r² = (0.65)² = 0.4225

(45) FALSE

$\alpha$ Represents the intercept of a regression equation and not its slope.

(46) TRUE

(47) TRUE

Regression equation is of following form:

Y = a + bX where Y: Dependent variable and X: Independent variable

(48) (A)

Scatter diagram depicts relationship between two variables in a X-Y plane.

(49) FALSE

If correlation coefficient be r, then

- 1 $\leq$ r $\leq$ +1

Strength of correlation is measured by absolute value of r, while actual value of r can be positive or negative. If r > 0, there is positive correlation and if r < 0, there is negative correlation. But strength of correlation is measured by absolute value of r which is independent of sign.

(50) (A)

Predictor variable is called independent variable and Predicted variable is called dependent variable.

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