SOLUTION: The following data relates to daily bill on consumption of a certain commodity for 600 households Daily bills (KSh) 10 - 20 20 - 30 30 - 40 40 - 50 50 - 60 60 - 70 70 - 80 80 -

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Question 918908: The following data relates to daily bill on consumption of a certain commodity for 600 households
Daily bills (KSh) 10 - 20 20 - 30 30 - 40 40 - 50 50 - 60 60 - 70 70 - 80 80 - 90 90 - 100
No. of households 60 70 110 100 60 50 90 30 30
i) Calculate the mean
ii) Calculate the median
iii) Calculate the standard deviation
iv) Calculate the coefficient of skewness
v) Comment on the skewness of this distribution
vi) Calculate the coefficient of variation
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 

Hi

Mid	f	M*f	M - m  (M - m)^2 f(M - m)^2

15	60	900	-34	1156	69360

25	70	1750	-24	576	40320

35	110	3850	-14	196	21560

45	100	4500	-4	16	1600

50	60	3000	1	1	60

65	50	3250	16	256	12800

75	90	6750	26	676	60840

85	30	2550	36	1296	38880

95	30	2850	46	2116	63480

	600	29400			308900

		49 mean			515.6928214

					22.70887492 sd

mean = 49

median = 46 

sd = 22.7

P = 3(49-46)/22.7

CV = 

 

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