Flashcards in Chapter 5 Practice Questions Deck (34)

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1

## What are the differences among people called?

### individual differences

2

## When are descriptive statistics used?

### Describe data

3

## When are inferential statistics used?

### Help to researcher to draw conclusions from the data.

4

## What are frequency distribution showing?

### The number of participants with each possible score.

5

## What kind of data can frequency distributions be used with?

### Any kind of data

6

## What does cross-tabulation involve?

### It involves simultaneously categorising participants on more than one variable.

7

## What do frequency distributions give the frequency for?

### They give the frequency for each possible score.

8

## What do grouped frequency distributions give the frequency for?

### Range of scores where the ranges are of equal size.

9

## What type of frequency do continious variables requires?

### Grouped frequency distributions.

10

## What are the common distribution shapes?

### Symmetric and skewed.

11

## What is the most commion symmetric distubution?

### Normal distributoon.

12

## What are the three measures of central tendency?

### Mean, median and mode

13

## What are deviation scores?

### The distance each score is away from the mean

14

## What are the measures of variability?

### Range, variance and standared deviation

15

## What is a correlation?

### A correlation quantifies the strength and direction of a relationship between variables.

16

## What does regression use?

###
Regression use the relationship to predict one variable from the value of another

17

## What is a standard score?

### A standard score indicates how many standard deviations a score is above or below the mean.

18

## How is a standard score calculated?

### It is computed by subtracting the mean from the score and dividing the difference.

19

## What does variance take into affect?

### All scores where range is only highest and lowest

20

## What does the mean take into account?

### All scores where the mode can be unstable if just one or two scores change.

21

## What do correlations describe ?

### They describe the relationship between two or more variables.

22

## What is the population?

### The population is the larger group of people of interest.

23

## What is a sample?

### A subset that is drawn from the population.

24

## What is sampling error?

### The natural vairation among different samples from the same population.

25

## What does alpha level refer?

### It refers to the cutoff point used for making a decision to reject the null hypothesis.

26

## What does type 1 error?

### Type 1 error is rejecting the null hypothesis when it is true.

27

## What is type 2 error?

### Type 2 error is failing to reject the null hypothesis.

28

## What is the tests for mean differences?

### t-test and anova

29

## When is a t-test used?

### T-test ed when there are two groups.

30