Data Handling

Data Handling

1. Stem and Leaf Diagrams

   • Key: 2/6=26
   • Tens form the "Stem" of the diagram
   • Units form the "Leaf" of the diagram

2. Pie charts

   • All angles add up to 360 degrees.
   • The larger the number, the larger the angle.
   • Frequency/Total Number X 360

3. Histograms

   • Where the area represents the frequency.
   • Frequency Density=Frequency X Class Width.
   • Vertical Axis=Frequency Density.
   • Looks like a bar chart, but there's no spaces between the bars.

4. Scatter Graphs

   • Positive Correlation= When the crosses form a diagonal line to the top right.
   • Negative Corelation = When crosses form a diagonal line to the bottom right
   • Scatter diagrams are used to represent and compare two sets of data.

5. Frequency Polygons

   • Frequency polygons can be used to represent grouped data.