PH Cottrel

Question 0

Ordinal

Answer 0

Rank ordered

Ex: liberal, mod, cons

Question 1

Nominal

Answer 1

Name, no order

Ex: country of origin

Question 2

Dichotomous

Answer 2

One or other

Ex: male female

Question 3

Continuous

Answer 3

Ex: cholesterol levels

Question 4

Effect size

• equation
• meaning

Answer 4

r^2

How much of x explains y

Question 5

Pearson r

• when to use
• H0

Answer 5

2 continuous variables

r=0

Question 6

Spearman rank

- when to use

Answer 6

2 ordinal variables (satisfaction vs severity of illness)

Question 7

Chi square

• when to use
• H0

Answer 7

2 dichotomous variables (success/fail vs treat/untreat)
frequency observed = frequency expected
* want calculated chi square to be higher than critical chi square
* want low p value

Question 8

T test

• when to use
• H0

Answer 8

1 dichotomous 1 continuous (Gender vs BP)

Mu1 = Mu control

Question 9

ANOVA

• when to use
• H0

Answer 9

1 nominal (more than 1 level) 1 continuous (Blood type vs Hb level)
Mu1=Mu2=Mu3

Question 10

Factorial/N-way ANOVA

- when to use

Answer 10

More than 1 nominal IV
1 continuous DV

2 way has 2 IVs (many levels)
3 way has 3 IVs (many levels)

Question 11

Repeated measures ANOVA

Answer 11

DV measured multiple times

Question 12

Multivariate ANOVA

Answer 12

More than 1 DV

Question 13

Analysis of covariance

Answer 13

Controls for gender when looking at weight loss

Question 14

Parametric

• definition
• example

Answer 14

Normal distribution

Pearson r

Question 15

Nonparametric

Answer 15

Not normal distribution

Question 16

How to tell if something is statistically significant

Answer 16

Look at p value or CI

Question 17

How to see if something has practical significance

Answer 17

Look at effect size (r^2)