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Flashcards in Final Deck (20):
1

Standard error of estimate

Sy.x
Amount of error in a prediction, average deviation from line

2

Sy.x increases with

increased variance

3

Pearson r

measure of strength and direction of a relationship, linear only

4

r^2

variability in a factor associated with differences

5

Properties of r

From -1 to 1
+-1 is a perfect linear relationship
Unitless
Represents the strength/magnitude of a relationship

6

Direct relationship

+r

7

Inverse relationship

-r

8

As standard error increases

the greater the spread

9

y = bx + a

b = slope, a = y-intercept

10

Use corr t test for

matched groups, repeated measures, or when the data is clearly correlated

11

Repeated Measures

Same subjects in all conditions

12

For a t test, assume _____ of variance

homogeniety

13

The higher the ____, the more leptokurtic the t

N

14

As N increases, the standard deviation of t gets closer to

1

15

Directional tests are ____ powerful than non-directional test

more

16

Power increases as _____ increase

alpha, N, intensity of IV

17

Type 1 Error

Rejcted Ho when it was true, power = alpha

18

Type 2 Error

Failed to reject Ho when it was false, power = beta

19

Correctly rejecting Ho

power = 1 - beta

20

Correctly retaining Ho

power = 1 - alpha