he U.S. News and World Report is assessing the reliability of its measure of academic reputation used in its annual ranking of colleges and universities. To do so, it administers the same questions on academic reputation to its sample of academic administrators in March and again in June.

In the U.S. News and World Report study of school rankings, academic reputation is measured with five questions about each university. Which test will assess the extent to which those five items reflect academic reputation?

A.Test-retest

B. Cronbach's alpha

C. Parallel forms

D.Split-half E. KR20

_____ is the extent to which a measurement is accurate and precise.

A.Reliability

B.Validity

C.Practicality

D.Significance

E.Standardization

3.Which of the following statements is NOT true?

Choose one answer.

	a.The variance of the residuals has no influence on the uncertainty in estimating the regression coefficients.
	b.In simple linear regression, the slope of the regression line is proportional to the correlation between X and Y.
	c.The R2for a regression of Y onto X and the R2for the regression of X onto Y are equal.
	d.Least squares residuals are not correlated with the fitted values.

4.Let y_ibe the observed values in a dataset and f_ibe the modeled values from a regression. Let ymean be the mean of the observed data. Which of the following is the regression sum of squares (SSR)?

Choose one answer.

	a.(yi-ymean)2
	b.(fi-ymean)2
	c.(fi-yi)2
	d.None of the above

5.Which of the following is always true when we add an independent variable to a multiple regression model? Choose one answer. a. Adjusted coefficient of determination decreases. b. Unadjusted coefficient of determination increases. c. Adjusted coefficient of determination increases. d. Unadjusted coefficient of determination decreases.