Find the mean, mode, S.D. and coefficient of skewness for the following data:
|No. of persons (cumulative):||15||32||51||78||97||109|
Calculate coefficient of variation from the following data:
|Income (in Rs):||1000-1700||1700-2400||2400-3100||3100-3800||3800-4500||4500-5200|
|No. of families:||12||18||20||25||35||10|
An analysis of the weekly wages paid to workers in two firms A and B, belonging to the same industry gives the following results:
|Firm A||Firm B|
|No. of wage earners||586||648|
|Average weekly wages||Rs 52.5||Rs. 47.5|
|Variance of the
|distribution of wages|
(i) Which firm A or B pays out larger amount as weekly wages?
(ii) Which firm A or B has greater variability in individual wages?
The following are some particulars of the distribution of weights of boys and girls in a class:
|Mean weight||60 kg||45 kg|
Which of the distributions is more variable?