The mean of x+y observations is x-y find the sum of all the observations. Give mean of x + y observations is x - y.
we know x = `frac(Sigmaf_iu_i)(f_i)`

The mean of the observations x-1, x and x + 1 is

Observe the following statements : (A) : 10 is the mean of a set of 7 obervations and 5 is the mean of a set of 3 observations. The mean of a combined set is 9. (R ) : If bar(x)_(i)(i = 1,2,…,k) are the means of k - series n_(i)(I = 1,2,3,…,k) respectively, then the combined or composite mean is bar(x) = (n_(1)bar(x)_(1) + n_(2) bar(x)_(2) + ...+ n_(k)bar(x_(k)))/(n_(1)+n_(2)+...+n_(k))

From the observations given below, suggest the relation between X, Y and Z

Find the sum of: 7x^2y and -6x^2y

The mean of a set observations is bar(x) . If each observation if divided by alpha (!= 0) and it is increased by 10, then the mean of the new set is

If the mean of 4, x, 6,9,9,y and 13 is 8 then the relation between X and Y is

Consider the reaction Silver mirror observed Identified A, X, Y and Z

Let bar(x) and M.D be the mean and the mean deviation about bar(x) of n observations x_(p) , i=1, 2 . . . . . n . If each of the observation is increased by 5, then the new mean deviation about the new mean, respectively are .