Exam 3: Measures of Central Tendency and Variability

A case value that is much larger or much smaller than most other values in a data set is called:

The statement that "the largest number of assaults in our city were gang-related" is another way of describing what statisticians refer to as the:

What measure of variability is the square root of the variance?

An extremely large or small measurement of a variable has the greatest effect on the variable's

In a box plot, what does the horizontal line within the box represent?

Which measure of central tendency always falls at about the 50^th percentile rank?

In a distribution of a variable that can be described as "bimodal,"

In a box plot, what do any numbered dots above or below the horizontal lines that are outside the box represent?

If an instructor adds five points to everyone's grade on an exam, what will not change?

A measure of central tendency describes what was of a variable within a data set.

A measure of central tendency that is used to cancel out the effects of a few extremely large or small values of a variable within a data set is the:

In a social work course, an instructor wishes to assign a final grade based upon 10 percent for class discussion, 40 percent for a term paper, and 25 percent for each of two examinations. What measure of central tendency should she use in computing her final grades?

Which measure of central tendency is always present as an actual case value within a data set?

With what measure of variability do larger numbers represent more variation in the distribution of a variable?

What measure of variability uses only two case values in its computation?