Histograms and Misleading Diagrams

Question 1

What is a histogram?

Answer 1

An approximate representation of the distribution of numerical data

Question 2

Histogram frequency

Answer 2

The area of the bar represents the frequency so: frequency density x class width= frequency. Rearranging this formula gives: frequency density= frequency/class width

Question 3

Can you compare Histograms?

Answer 3

You can compare histograms if they have the same class intervals and same frequency density scales

Question 4

Things within a misleading diagram

Answer 4

Three dimensional diagrams make comparison difficult
Scale doesnt start fom 0
No key
Missing sectors