Data analysis - graphs Flashcards
1
Q
When is it appropriate to use a bar graph?
A
For categorical/discrete/ nominal data
2
Q
When is it appropriate to use a line graph?
A
To present data that changes over time, continuous data
3
Q
When is it suitable to use a scattergram?
A
When there are two co-variables, neither of which has been manipulated (no IV)
Continuous data
4
Q
When is it suitable to use a histogram?
A
When continuous data has been divided into intervals
5
Q
How to you calculate a percentage increase?
A
Work out the difference in the numbers you are comparing, divide the increase by the original number and x 100
6
Q
How do you calculate percentage decrease?
A
Subtract final value from starting value, divide that amount by the starting value, x 100
