Chapter 3

Question 1

measures of central tendency

Answer 1

Categories or scores that describe what is average or typical of the distribution.

Question 2

mode

Answer 2

The category or score with the highest frequency (or percentage) in the distribution.

Question 3

median

Answer 3

The score that divides the distribution into two equal parts so that half the cases are above it and half below it.

Question 4

percentile

Answer 4

A score below which a specific percentage of the distribution falls.

Question 5

mean

Answer 5

A measure of central tendency that is obtained by adding up all the scores and dividing by the total number of scores. It is the arithmetic average.

Question 6

symmetrical distribution

Answer 6

The frequencies at the right and left tails of the distribution are identical; each half of the distribution is the mirror image of the other.

Question 7

skewed distribution

Answer 7

A distribution with a few extreme values on one side of the distribution.

Question 8

positively skewed distribution

Answer 8

A distribution with a few extremely high values.

Question 9

negatively skewed distribution

Answer 9

A distribution with a few extremely low values.