1.

Let x_1,x_2,x_3,………,x_n be n observations . Let W_i = lx_i + k for i=1,2,……,n, where l and k are constants. If the mean of x_i'sis 48 and their standard deviation is 12, the mean of w_i's is 55 and standard deviation of w_i's is 15, the values of l and k should be ..........

Answer»

L = 1.25 and K = -5
l = -1.25 and k = 5
l = 2.5 and k = -5
l = 2.5 andk = 5

ANSWER :A


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