Question

The following data relates to daily bill (in Kshs) on consumption of a certain commodity for 60 households

Daily bills (Kshs) No. of households
10 - 20 6
20 - 30 7
30 - 40 11
40 - 50 10
50 - 60 6
60 - 70 5
70 - 80 9
80 - 90 3
90 - 100 3


i) Calculate the mean
ii) Calculate the median
iii) Calculate the mode
iv) Calculate the standard deviation
v) Calculate the coefficient of skewness
vi) Comment on the skewness of this distribution
vii) Calculate the coefficient of variation