AS/A2 Stats 2 Stats 3

S1 Topic 2: Representation and summary of data
Mean and median
This Java applet shows how the relationship between the mean and the median and illustrates several aspects of these measures of central tendency. The applet begins by showing a histogram of 9 numbers. As can be seen in the histogram, the numbers are: 3, 4, 4, 5, 5, 5, 6, 6, and 7. The mean and median of the numbers are both 5.0. The mean is shown on the histogram as a small blue line; the median is shown as a small purple line. The standard deviation is 1.15. A red line extends one sd in each direction from the mean. You can change the values of the data set by "painting" the histogram with the mouse.

an applet from the Rice Virtual Lab in Statistics