Cumulative Frequency Graph Lower Quartile. Reading from the graph the lower quartile is 38. Find the median values.
The cumulative frequency is plotted on the y axis against the data which is on the x axis for un grouped data. A cumulative frequency graph also known as an ogive is a curve showing the cumulative frequency for a given set of data. To find the upper quartile find frac 3 4 of 40 which is the 30th value.
To find the upper quartile find frac 3 4 of 40 which is the 30th value.
Reading from the graph the lower quartile is 38. Reading from the graph the upper quartile is 47. Write down the upper class boundaries. The cumulative frequency is plotted on the y axis against the data which is on the x axis for un grouped data.
