Exam 2 chapter 5

Question 1

statistics generalize from a ______ to a _______.

Answer 1

sample, population

Question 2

what is a nominal scale?

Answer 2

classifying objects, no order information, numbers do not have meaning.

Question 3

What is an ordinal scale?

Answer 3

category order matters, difference is not necessarily the same,

Question 4

what is an interval scale?

Answer 4

order matters, equal units of measurements, do not have true zero value

Question 5

what is a ratio scale?

Answer 5

order matters, equal units of measurements, true zero, meaningful ratios

Question 6

what can we do with statistics?

Answer 6

describe data, measure relationships, compare groups

Question 7

what is the only average appropriate for nominal data?

Answer 7

mode

Question 8

true or false: the mode can be used with any scale

Answer 8

true

Question 9

the median can be used with which scales?

Answer 9

ordinal, interval, ratio

Question 10

the mean can be used with which scales?

Answer 10

interval or ratio scales

Question 11

define measures of dispersion

Answer 11

how spread out the data is

Question 12

define range

Answer 12

distance from highest to lowest value

Question 13

what is inclusive range?

Answer 13

highest score - lowest score +1

Question 14

define exclusive range

Answer 14

highest score - lowest score

Question 15

define standard deviation

Answer 15

average distance of scores from the mean

Question 16

define variance

Answer 16

standard deviation squared

Question 17

standard deviation and variance can only be calculated on what two types of data?

Answer 17

interval, ratio

Question 18

define correlation

Answer 18

degree of relationship of two variables

Question 19

the correlation ranges between what?

Answer 19

-1.00 and 1.00

Question 20

define positive correlation

Answer 20

when one variable increases, the other variable increases

Question 21

define negative correlation

Answer 21

when one vairable increases, the other decreases

Question 22

pearson’s product-moment correlation is used with which types of data

Answer 22

interval/ratio

Question 23

define multiple correlation

Answer 23

correlation bwetween multiple variables and one particular variable

Question 24

the multiple correlation number between what?

Answer 24

0.00 - 1.00

Question 25

define mulitple regression

Answer 25

gives info about each predictor variable

Question 26

define error variance

Answer 26

differences among scores in a group that has variablitliy

Question 27

define t-test

Answer 27

comprairing two gorups to find a significant difference

Question 28

define analysis of variance

Answer 28

test used to compare three or more groups

Question 29

define independent samples t-test

Answer 29

compraing two groupd

Question 30

define dependent samples t-test

Answer 30

two sets of score from one group tested twice

Question 31

define parameter

Answer 31

characteristic of a population

Question 32

define parametric terst

Answer 32

makes assumptions about population parameters

Question 33

define nonparametric test

Answer 33

tools used to measure data not on a interval or ratio scale

Question 34

spearman’s rho is used for which type of data?

Answer 34

ordinal