Psych 209: Statistics

Question 1

Measures of Central Tendency

Answer 1

statistics that identify the center of a “distribution” of scores

Question 2

Frequency Distribution

Answer 2

shows how often each value occurs in a distribution

Question 3

Descriptive Statistics

Answer 3

summarize information about any set of data

Question 4

Mode

Answer 4

the most frequently occurring score in a distribution

Question 5

Median

Answer 5

the middle score in a distribution

Either dead center, or the average of the center two (for even amounts of data)

Question 6

Mean

Answer 6

The average of a set of data

Question 7

Measures of Dispersion

Answer 7

quantify the degree to which a set of scores, overall, differs from the mean

Question 8

Variance

Answer 8

the average of the squared deviations about the mean

SUM(X - MEAN)^2 / N

Question 9

Standard Deviation

Answer 9

The square root of the variance

Question 10

Range

Answer 10

Largest # - smallest #

Question 11

Inferential Statistics

Answer 11

data from a sample that is used to estimate characteristics of a larger population