S2Exam1Review

A researcher summarizes a set of data by describing the score that occurred most often. What type of statistics did the researcher use to summarize these data?

• descriptive

• inferential

• analytical

• professional

To study NCAA athletes at a local college, a researcher measures behavior in a portion of all athletes at the college. What type of statistics can the researcher use to draw conclusions about the behavior of all athletes at the college?

• descriptive

• parameter

• inferential

• professional

A researcher selects a ________ and uses inferential statistics to draw conclusions about the larger ________.

• sample; statistic

• parameter; population

• population; sample

• sample; population

A researcher measures the number of hours spent studying among students living on-campus and off-campus at a local college. In this study, location (on-campus, off-campus) is the ________, and hours spent studying is the ________.

• independent variable; dependent variable

• dependent variable; independent variable

• quasi-independent variable; dependent variable

• dependent variable; quasi-independent variable

13. State the scales of measurement from least to most informative:

• ratio, interval, ordinal, nominal

• nominal, ordinal, interval, ratio

• ordinal, interval, nominal, ratio

• nominal, ratio, ordinal, interval

A continuous variable:

• is measured along a continuum

• can be measured at any place beyond the decimal point

• can be measured in whole units or fractional units

• all of the above

If the smallest score in a distribution is 10 and the largest is 32, then what is the real range for these data?

• 20

• 21

• 22

• 23

If the smallest score in a distribution is 12 and the largest is 71, then what is the interval width if we create 6 intervals?

• 6

• 9.83

• 10

• 12

The lower boundaries in a frequency distribution of response times (in seconds) during a training exercise are 65, 76, 87, and 98. What is the interval width for this frequency distribution?

• 9

• 10

• 11

• 12

A researcher records the following time (in seconds) that children in a sample play with an unfamiliar toy: 12, 14, 10, 6, 8, 10, 13, 12, 4, 12, and 6. Which measure of central tendency (the mean, the median, or the mode) is largest?

• mean

• median

• mode

• all measures for central tendency are equal