Find the median of the following data.
`{:("Class Interval",f),(" "0-4,3),(" "4-8,6),(" "8-12,6),(" "12-16,6),(" "16-20,8):}`

Draw the frequency curve for the following data. {:("Class Interval",f),(" "2-5,12),(" "5-8,8),(" "8-11,8),(" "11-14,6),(" "14-17,10),(" "17-20,9):}

Find the median of the following data: {:("Class Interval",0-10,10-20,20-30,30-40,40-50),(f,6,8,5,4,7):}

Calculate the mean deviation about the mean for the following frequency distribution Class interval 0-4,4-8,8-12,12-16,16-20 Frequency 4,6,8,5,2

Calculate the mean deviation about the mean for the following frequency distribution Class interval 0-4,4-8,8-12,12-16,16-20 Frequency 4,6,8,5,2

Find the median of the data 5, 8 , 4, 12 , 16 and 10 .

Find the variance of the following data : 6, 8, 10, 12, 14, 16, 18, 20, 22, 24.