1. Section 2.3
HISTROGRAM

2. HISTOGRAM
Graphs of continuous (quantitative) data (touching bars) where widths are equal and heights are different.
Widths – class boundaries
class midpoints
lower class limits
Heights – frequency

3. BAR GRAPH VS HISTOGRAM

4. Example
Is this a Histogram?

5. Lets change it to a Histogram
Instead of the x-axis being colors of cars and y- axis being the amount,
let us have x-axis be the number of cars and the y-axis be how many colors fit in that category

7. Relative Frequency Histogram
A histogram where the frequency is replaced with a percentage.

8. SKEWED A distribution of data that is not symmetric.
There are two type of skewed
Skewed to the right / right skewed / positive skewed
Skewed to the left / left skewed / negative skewed

9. SKEWED TO THE RIGHT

10. SKEWED TO THE LEFT

11. EXAMPLE
Consider the following The Annual Salaries ($) for 20 Selected Employees at a Local Company