1What mathematical technique will we use to determine the standard deviation of a data array consisting of 30 observations if we know the variance?

A. We'll subtract the standard deviation from the variance and divide by 30.

B. We'll subtract the mean value from each absolute observation value and divide by 30.

C. We'll calculate the square root of the standard deviation based on the variance.

D. We'll calculate the square root of the variance

2In general, the dependent variable is to the _______ as an independent variable is to a/an _______ variable.

A. outcome; predicted

B. outcome; explanatory

C. variance; predicted

D. variance; explanatory

3An insurance company can use the formula for calculating expected value to establish expected _______ on 10,000 home insurance policies, thus allowing them to calculate _______ fair premium prices.

A. gain; monetarily

B. gain; actuarially

C. loss; monetarily

D. loss; actuarially

4Data show that measures of job satisfaction (not to mention increased pay) are markedly higher for lieutenants than for sergeants in the NYPD. The criterion for getting a promotion from sergeant to lieutenant is passing a lieutenant exam. As it turns out, the exam has an exact cut-off score of 90. Deciding on conducting a _______ study, we compare the personal characteristics of people who make the cut and those who don't quite make it, looking at people with exam scores of 90, 91 and 92 compared with people who scored 87, 88, and 89.

A. contingency

B. discrepancy

C. discontinuity

D. comparative