Exam 2 chapter 5 Flashcards

1
Q

statistics generalize from a ______ to a _______.

A

sample, population

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is a nominal scale?

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is an ordinal scale?

A

category order matters, difference is not necessarily the same,

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is an interval scale?

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is a ratio scale?

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what can we do with statistics?

A

describe data, measure relationships, compare groups

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is the only average appropriate for nominal data?

A

mode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

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

A

true

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

the median can be used with which scales?

A

ordinal, interval, ratio

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

the mean can be used with which scales?

A

interval or ratio scales

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

define measures of dispersion

A

how spread out the data is

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

define range

A

distance from highest to lowest value

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is inclusive range?

A

highest score - lowest score +1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

define exclusive range

A

highest score - lowest score

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

define standard deviation

A

average distance of scores from the mean

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

define variance

A

standard deviation squared

17
Q

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

A

interval, ratio

18
Q

define correlation

A

degree of relationship of two variables

19
Q

the correlation ranges between what?

A

-1.00 and 1.00

20
Q

define positive correlation

A

when one variable increases, the other variable increases

21
Q

define negative correlation

A

when one vairable increases, the other decreases

22
Q

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

A

interval/ratio

23
Q

define multiple correlation

A

correlation bwetween multiple variables and one particular variable

24
Q

the multiple correlation number between what?

A

0.00 - 1.00

25
define mulitple regression
gives info about each predictor variable
26
define error variance
differences among scores in a group that has variablitliy
27
define t-test
comprairing two gorups to find a significant difference
28
define analysis of variance
test used to compare three or more groups
29
define independent samples t-test
compraing two groupd
30
define dependent samples t-test
two sets of score from one group tested twice
31
define parameter
characteristic of a population
32
define parametric terst
makes assumptions about population parameters
33
define nonparametric test
tools used to measure data not on a interval or ratio scale
34
spearman's rho is used for which type of data?
ordinal