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1. Psychology > Discovering Statistics > Flashcards

Flashcards in Discovering Statistics Deck (30)
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1

Sampling variation

Samples will vary because they contain different members of the population

2

Sampling distribution

Frequency distribution of sample means from the same population.

3

Standard error (SE)

Standard deviation of sample means. Usually estimated through statistical procedures rather than collecting many different samples. Measure of how representative sample is likely to be of the population.

4

Confidence intervals

Boundaries within which we believe the true value of the population mean will fall.

5

Systematic variation

Result of some genuine effect (whether it be natural variation between sets of variables or researcher effects). Can be explained by the model we're using

6

Unsystematic variation

Variation not due to the effect we are studying. Variation that can't be explained by the model we're using.

7

One-tailed test

Using a directional hypothesis (x will increase y)

8

Two-tailed test

Non-directional hypothesis (x will increase OR decrease y).

9

Systematic variation

Result of some genuine effect (whether it be natural variation between sets of variables or researcher effects). Can be explained by the model we're using

10

Unsystematic variation

Variation not due to the effect we are studying. Variation that can't be explained by the model we're using.

11

One-tailed test

Using a directional hypothesis (x will increase y)

12

Two-tailed test

Non-directional hypothesis (x will increase OR decrease y).

13

Small effect size correlation coefficient

.10 effect explains 1% of total variance

14

Medium effect size correlation coefficient

.30 effect accounts for 9% of total variance

15

Large effect size correlation coefficient

.50 effect accounts for 25% of variance

16

Small effect size correlation coefficient

.10 effect explains 1% of total variance

17

Medium effect size correlation coefficient

.30 effect accounts for 9% of total variance

18

Large effect size correlation coefficient

.50 effect accounts for 25% of variance

19

Small effect size correlation coefficient

.10 effect explains 1% of total variance

20

Medium effect size correlation coefficient

.30 effect accounts for 9% of total variance

21

Large effect size correlation coefficient

.50 effect accounts for 25% of variance

22

Small effect size correlation coefficient

.10 effect explains 1% of total variance

23

Medium effect size correlation coefficient

.30 effect accounts for 9% of total variance

24

Large effect size correlation coefficient

.50 effect accounts for 25% of variance

25

Small effect size correlation coefficient

.10 effect explains 1% of total variance

26

Medium effect size correlation coefficient

.30 effect accounts for 9% of total variance

27

Large effect size correlation coefficient

.50 effect accounts for 25% of variance

28

Small effect size correlation coefficient

.10 effect explains 1% of total variance

29

Medium effect size correlation coefficient

.30 effect accounts for 9% of total variance

30

Large effect size correlation coefficient

.50 effect accounts for 25% of variance