Graphs Flashcards
What type of data can we put into graphs?
Quantitative data
How de we present and display quantitative data?
Using a table typically with a summary paragraph below to explain the results
What are bar chats the most suitable graph for?
Showing the difference in mean values
When are bar charts used?
When data is divided into categories - discrete data
What do scattergrams depict?
Associations between co-variables
What do histograms show?
The frequency of scores in a continuous data set
How do histograms show that data is continuous rather than discrete?
Because the bars in a histogram touch whereas in a bar chart they dont.
What is the X-axis of a histogram made up of?
Equal sized intervals of a single category
What does the Y-axis of a histogram represent?
The frequency within each interval
What would happen if there was a zero frequency for an interval in a histogram?
The interval would remain but without a bar.
What do line graphs represent?
Continuous data and use points connected by lines to show how something changes in value
In a line graph, on what axis are the IV and DV usually plotted on?
IV = X-axis
DV = Y-axis
What is a normal distribution?
When measuring certain information the frequency of this information produces a bell-shaped curve.
The most people are located in the middle.
What is a skewed distribution?
When the curve leans to one side or another.
What is a positive skew?
Where most data is concentrated to the left which means the majority of people have scored low.
