# GRAPHS AND DISTRIBUTIONS

# GRAPHS AND DISTRIBUTIONS

by katherine pierce
# 1. BAR CHARTS

## 1.1. most suitable graph to see differences between means

## 1.2. used when data is in categories

## 1.3. horizontal x axis

### 1.3.1. categories

## 1.4. vertical y axis

### 1.4.1. frequency mean

## 1.5. should include

### 1.5.1. title including the IV and the DV

### 1.5.2. labelled x axis (categories/conditions of the IV)

### 1.5.3. labelled y axis (frequency of each category e.g. DV)

### 1.5.4. appropriate scale

### 1.5.5. gap between bars

# 2. DISTRIBUTIONS

## 2.1. normal

### 2.1.1. bell shaped curve that is symmetrical

### 2.1.2. mean, median and mode are all at the midpoint

### 2.1.3. most scores are close to the mean

### 2.1.4. less scores are further from the mean

### 2.1.5. some extreme scores are possible

## 2.2. positive

### 2.2.1. curve leans left

### 2.2.2. most distribution is towards the left

### 2.2.3. resulting in a long tail on the right

## 2.3. negative

### 2.3.1. curve leans right

### 2.3.2. most distribution is towards the right

### 2.3.3. resulting in a long tail on the left

# 3. SCATTERGRAMS

## 3.1. this is used with correlations

## 3.2. do not show 'differences' they show 'relationships' between 2 variables

## 3.3. each variable is plotted on either the x axis or the y axis

### 3.3.1. it doesn't matter which

## 3.4. you then plot according to these axis

## 3.5. should include

### 3.5.1. title (a graph to show the relationship between _____ and ______

### 3.5.2. labelled x and y axis (two co-variables)

### 3.5.3. appropriate scale

### 3.5.4. accurately plotted

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