ch 15: stats

Question 1

descriptive stats

Answer 1

methods that help researchers organize, summarize and simplify the results obtained from research studies

Question 2

inferential stats

Answer 2

uses the limited info from samples to answer general questions about populations

Question 3

statistic

Answer 3

summary value that describes a sample

Question 4

parameters

Answer 4

a summary value that describes a population

Question 5

frequency distributions

Answer 5

group scores into an organized display that shows the entire set

Question 6

in a histogram, the bars ____

Answer 6

touch each other

Question 7

when categories do not use numerical values, the frequency distribution is presented as a ____

Answer 7

bar graph

Question 8

central tendency

Answer 8

stat measure that identifies a single score that defines the center of a distribution; goal is to identify the value that is most typical or most representative of the entire group

Question 9

median

Answer 9

score that divides a distribution in half

Question 10

mode

Answer 10

score with the greatest frequency

Question 11

the only central tendency measure for categories that are not numerical is ____

Answer 11

mode

Question 12

standard deviation

Answer 12

describes how the scores are scattered around the mean

Question 13

variance

Answer 13

square each score of deviation and compute the average (divide by n-1; aka degrees of freedom)

Question 14

deviation

Answer 14

distance from the mean

Question 15

to get SD from variance….

Answer 15

take the square root of the variance