Cumulative Frequency Graph Lower Quartile. How to obtain a cumulative frequency graph from a cumulative frequency table. Therefore the iqr is 20 bear in mind that this is a rough sketch if you plot the values on graph paper you will get a more accurate value.
Calculate the cumulative frequency. Find the upper and lower quartiles. Here you will be shown a short example on how to read off the lower quartile from a cumulative frequency curve.
Therefore the iqr is 20 bear in mind that this is a rough sketch if you plot the values on graph paper you will get a more accurate value.
In the example you have a group of runners w. How to obtain a cumulative frequency graph from a cumulative frequency table. Reading from the graph the upper quartile is 47. Now we sketch a graph of score on the x axis against cumulative frequency on the y axis.
