AQA Psychology - Research Methods - Data Analysis: Graphs
A bar chart is a graph used to display discrete data, with categories placed along the x-axis and frequency on the y-axis. The height of each bar represents the frequency of that category, and the bars are kept separate to show distinct groups.
What are the types of ways to present and display quantitative data?
Tables
Bar charts
Histograms
Line graph
Scattergram
Key Terms
What are the types of ways to present and display quantitative data?
Tables
Bar charts
Histograms
Line graph
Scattergram
What is a table?
Raw score displayed in columns and rows
- Summary paragraph underneath to explain results
What is a bar chart?
Categories (discrete data) placed along x-axis and frequency on y-axis
Height of column represent frequency
What is a histogram?
Bars touch each other
Continuous data
True zero
What is line graph?
Frequency on one axis, data on another is continuous
-Often shows change
What is a scattergram?
Represent correlation analysis
Each dot represent one pair of related data
Axis must both be contentious
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| Term | Definition |
|---|---|
What are the types of ways to present and display quantitative data? | Tables Bar charts Histograms Line graph Scattergram |
What is a table? | Raw score displayed in columns and rows - Summary paragraph underneath to explain results |
What is a bar chart? | Categories (discrete data) placed along x-axis and frequency on y-axis Height of column represent frequency |
What is a histogram? | Bars touch each other Continuous data True zero |
What is line graph? | Frequency on one axis, data on another is continuous -Often shows change |
What is a scattergram? | Represent correlation analysis Each dot represent one pair of related data Axis must both be contentious |
What are the two types of distributions? | Normal - Skewed |
What are the two different types of skewed distributions? | Negative skew - Positive skew |
What is normal distribution? | Symmetrical, bell-shaped curve Mode, mean and median all occur at the midpoint of the curve Most people in the middle |
What is a skewed distribution ? | Distribution leans to one side or the other because most people are either lower or upper end of distribution |
Describe a negative skew: | Most distribution is to the right side of the graph - Long tail on the left |
Out of mode, median and mean which has the highest peak in a negative skew? | Mode |
Out of mode, median and mean which has the lowest peak in a negative skew? | Mean |
Out of mode, median and mean which has the middle peak in a negative skew? | Median |
Describe a positive skew: | Most distribution leans left side of the graph - Long tail on the right |
Out of mode, median and mean which has the highest peak in a positive skew? | Mode |
Out of mode, median and mean which has the lowest peak in a positive skew? | Mean |
Out of mode, median and mean which has the middle peak in a positive skew? | Median |
How can you remember whether a skewed distribution is negative or positively skewed? | With your feet Negative = left (big toe = mode) Positive = right (big toe = mode) |