module 15

Question 1

frequency distribution

Answer 1

a table in which all of the scores are listed along with the frequency with which each occurs

Question 2

class interval frequency distribution

Answer 2

scores are grouped into intervals and listed along with the frequency in each interval

Question 3

qualitative variable

Answer 3

categorical variable for which each value represents a discrete category

Question 4

bar graph

Answer 4

graphical representation of a frequency distribution in which vertical bars are used (qualitative variables)

Question 5

quantitative variable

Answer 5

a variable for which the scores represent a change in quantity

Question 6

histogram

Answer 6

bars represent frequency of occurrence for quantitative variables

Question 7

descriptive statistics

Answer 7

numerical measures that describe a distribution by providing information on the central tendency, width of distribution, and shape

Question 8

measure of central tendency

Answer 8

characterized the middleness of an entire distribution

mean median mode

Question 9

mean

Answer 9

average of distribution

Question 10

median

Answer 10

middle score in a distribution

Question 11

mode

Answer 11

occurs with greatest frequency

Question 12

measure of variation

Answer 12

indicates the degree to which scores are either clustered or spread out in a distribution
(range sd variance)

Question 13

range

Answer 13

difference between highest and lowest scores

Question 14

sd

Answer 14

average difference between scores in the distribution and the mean. square root of averaged squares deviation from the mean

Question 15

variance

Answer 15

sd squared