Flashcards in A2 statistical tests Deck (12)

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1

## Describe a Mann-Whitney U Test

###
- Test of difference

- Used with ordinal, interval or ratio data

- Used with an independent groups design

- Observed value should be equal to or less than the critical value to reject the null hypothesis

2

## Using a Mann-Whitney U test, how would you know you could reject the null hypothesis

### Observed value should be equal to or less than the critical value

3

## What test can be used on Independent groups (potentially a second also...)

###
Mann-Whitney U

Chi Squared

4

## Which 3 of the 4 tests can be used on interval, ordinal or ratio data?

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Mann-Whitney U

Wilcoxin T

Spearman's Rank Order Correlation

5

## Which test is for use on nominal data?

### Chi Squared

6

## Describe the Wilcoxin T test

###
- Test of difference

- The data should be ordinal, interval or ratio

- It is used with a repeated measures design or a matched pairs

- Observed value should be equal to or less than the critical value to reject the null hypothesis

7

## Using a Wilcoxin T test, how can we reject our null hypothesis?

### The observed value should be equal to or less than the critical value in order to reject the null hypothesis

8

## Describe a Chi Squared test

###
- This is a test of association (difference) when data is nominal

- It cannot be used with data or averages

- The data must be independent - something recorded in one category cannot be recorded in another

- Used on nominal data

- Observed value should be greater than the critical value to reject the null hypothesis

9

## How can we reject a null hypothesis using a Chi Squared test?

### The observed value must be greater than the critical value to reject the null hypothesis

10

## Describe the Spearman's Rank Order Correlation

###
- Used when testing for correlation with pairs of scores

- The data should be ordinal, interval or ratio

- The test gives a correlation coefficient with a value between +1.00 and -1.00

- The sign indicates the direction of the relationship (positive or negative)

- The number indicates the strength of correlation

- Observed value should be equal to or more than the critical value to reject the null hypothesis

11

## How can we reject a null hypothesis using a Spearman's Rank order Correlation test?

### The observed value must be more than or equal to the critical value to reject the null hypothesis

12