Chapter 12 Questions
What is the difference between the three ways of describing results: comparing percentages, comparing means, and correlating scores?
What is a frequency distribution?
Distinguish between a pie chart, bar graph, and frequency polygon. Construct one of each.
What is a measure of central tendency? Distinguish between the mean, median, and mode.
What is a measure of variability? Distinguish between the standard deviation and the range.
What is a correlation coefficient? What do the size and sign of the correlation coefficient tell us about the relationship between variables?
What is a scatterplot?
What happens when a scatterplot shows the relationship to be curvilinear?
What is a regression equation? How might an employer use a regression equation?
How does multiple correlation increase accuracy of prediction?
What is the purpose of partial correlation?
When a path diagram is shown, what information is conveyed by the arrows leading from one variable to another?
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