1Based on the central limit theorem, we will know that at the 95 percent level of confidence, 95 of 100 observed math achievement scores will fall within _______ standard errors to either side of the population mean.

A. 3.0

B. 1.96

C. 2.0

D. 0.95

2What we call the sampling error is, simply, the _______ variation that results from taking a sample as opposed to studying the whole study population.

A. incidental

B. natural

C. improvident

D. accidental

3. In the context of interpreting the results of a multiple regression analysis, which statement is true?

.

A. As the sample size increases, the size of the standard error will also increase.

B I. If the sign of an independent variable is "+," its correlation with the dependent variable will be negative.

C. If the sign of an independent variable is "+," its correlation with the dependent variable will be positive.