# Solved >   11.In using the Z-test for comparing two:1517187 …

11.In using the Z-test for comparing two proportions, the null hypothesis is typically stated as ____.

a.?1 = ?2.

b.?1??2.

c.?1 x ?2 = 1

d.?1?2 = 1

12.When the on-time performance of airlines is used to predict the number of customer complaints in a regression equation, on-time performance is the ____ variable and the number of customer complaints is the ____ variable.

a.independent; dependent

b.dependent; dependent

c.dependent; independent

d.independent; predictor

13.In regression analysis, the symbol X is commonly used for the ____ variable, and the symbol Y is commonly used for the ____ variable.

a.dependent; moderating

b.independent; dependent

c.dependent; independent

d.independent; moderating

14.In the regression equation, Y = a + ??X, Y is the ____.

a.dependent variable

b.slope

c.independent variable

d.intercept

15.In the regression equation, Y = a + ??X , ?is the ____.

a.y-intercept

b.independent variable

c.slope of the regression line

d.dependent variable

16.In the regression equation, Y = a + ??X, a is the symbol for the ____.

a.slope of the regression line

b.y-intercept of the regression line

c.dependent variable

d.independent variable

17.The equation, Y = a + ??X,is the equation for the ____.

a.coefficient of determination

b.correlation coefficient

c.least-squares regression line

d.F-test

18.Consider this regression equation:Y = 24.35 – 14.2 X.Here, 24.35 is the ____, and -14.2 is the ____.

a.slope; y-intercept

b.independent variable; slope

c.dependent variable; y-intercept

d.y-intercept; slope

19.If the regression equation is:Y = -4.2 + 3.6 X, then the expected score for Y when X is 4 would be ____.

a.-18.6

b.10.2

c.18.6

d.20.2

20.Which value provides a common metric allowing regression results to be compared to one another,regardless of what the original scale range may have been?

a.standardized regression coefficient (?)

b.?2

c.coefficient of determination (R2)

d.raw parameter estimates

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