Graphs Flashcards
When to use bar charts?
What do they look like?
Discrete/categorical data
Bars do not touch eachother or vertical y axis
When to use histograms?
What do they look like?
Continuous data/individual scores for each ppt/displays frequencies
Bars do not touch each other and vertical y axis
When to use scattergrams?
What do they look like?
Relationship between two co-variables
Each plot represents one ppt but two scores
What’s discrete data?
Info that can be categorised into groups, the data can only appear in one category. Cannot be sub-divided.
What’s continuous data?
Data that can be measured using scientific tools
Bar charts are used when?
-To display discrete/categorical data
-Used when data is divided into categories. These categories will appear as words not numbers.
-The categories will occupy the horizontal x axis
-The frequency or amount of each category is plotted on the vertical y axis
-used to compare conditions
-The bars never touch to show we’re dealing with separate conditions
Bar charts display what type of data?
Discrete/categorical data
Do bars on bar charts ever touch?
No
Bar charts are used when the data is…
Divided into categories. And appear as words
Histograms are used when?
-To display continuous data OR data where each ppt has an individual score
-Represent frequencies
-The scores which are made up of equal sized intervals e.g 0-10,11-20, will always be represented on the horizontal x axis - equal widths in bars
-the frequency of ppl that have certain mark within each interval will always be represented in the vertical y axis
-If there was zero frequency for on of the intervals the interval would remain without a bar
-Bars should always be touching each other
Histograms display what type of data?
Continuous
Scattergrams are used when?
-To display a relationship between two co-variables
-Scattergrams represent correlations
-Each plot on graph represents one ppt and two scores
-One co-variable will go along vertical y axis and the other will go along the horizontal x axis
