data

data

1. averages and range

   • the mean is the data added together and divided by the number of the different sources of data
   • the median the middle point in the data
   • the mode is the most frequent result in the data
   • the range is the highest number take away the lowest number

2. compound bar charts

   • you need a key, different colours to represent data and a label for the properties on the x and y axis

3. stem and leaf diagram

   • each number before the represents one ten so 2| represents 20 and 1|4 means 14

4. line diagram

   • in a line graph you plot all the points and draw a line of best fit
     • a line of best fit is a line that expresses the relationship between the points the best

5. pie charts

   • to find out how many people 1% represents so for example 360/30 = 12 so 12% is one person

6. scatter graphs

   • they can have a positive, negative or no correlation meaning the relationship between each of the points