1. Bar Graphs & Histograms
Picturing Distributions with Graphs

2. The X-axis Can Be
1.Qualatative
2.Single Values
3.Intervals labeled by
a) Cut Points
b) Midpoint
Histogram’s Y Axis Can Be:
1.Frequency
2.Decimal Percents/Rel Freq

3. Analysis Should Always Include:
G – Gaps/Clusters
S - Shape
O - Outliers
C - Center
S - Spread

4. G – Gaps/Clusters O - Outliers

5. S - Shape
UniformSymmetric
Normal or
Bell Shaped
Skewed right Skewed left Bimodal

6. C - Center

7. S - Spread

8. Analysis:
G – Gaps/Clusters
S - Shape
O - Outliers
C - Center
S - Spread