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

10

## Unsystematic variation

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