Cumulative Frequency Median And Quartiles. So the interquartile range is 5. PPT on cumulative frequency graphs to find the median and quartiles.
Calculation of range and median along with Box-and-whisker plots and Cumulative frequency tables are effective ways to compare distributions and to summarise their characteristics. The second quartile is also equal to the median. If we divide a cumulative frequency curve into quarters the value at the lower quarter is referred to as the lower quartile the value at the middle gives the median and the value at the upper quarter is the upper quartile.
The interquartile range is therefore equals to the difference of 33 and 28 which is 33 28 5.
A set of numbers may be as follows. Find the median upper and lower quartiles and the interquartile range from a cumulative frequency diagram. The first value is the first frequency value we then add this to the second value to get the second cumulative frequency value. Measures of central tendency Meaning and characteristics of a good average-Types of statistical averages-mean median and mode- Mean-arithmetic mean-simple and weighted- Arithmetic mean-harmonic mean-geometric mean- relationship between arithmetic -harmonic and geometric.
