Find the mean and variance for the first 10 multiples of 3
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The following data gives the distribution of height of students : (in cm)HeightstudentsNumbers of 16012150815241614156315431557 The median of the distribution is
The following table gives the distribution of the life time of 400 neon lamps:
If the mean deviation of the numbers 1,1 +d, 1+2d,.., 1+100d from their mean is 225, then d is equal to
The variance of the first n natural numbers is
Find the mean deviation about the mean for the data 4,7,8,9,10,12,13,17
Two plants A and B of a factory show following results about the number of workers and the wages paid to them. A BNo. of workers 5000 6000Average monthly wages Rs 2500 Rs 2500Variance of distribution 81 100 of wagesIn which plant, A or B is there greater variability in individual wages?
From the data given below state which group is more variable A or B
Find the mean and variance for the data 6,7,10,12,13,4,8,12