Measures of central tendency and dispersion.
If W denotes the total number of spaces one moves under these special conditions, find the mean and standard deviation of W.
a) Presume X and Y are random variables with means 6 and 1, respectively. Let W = X - 2Y. Find the mean of W.
b) Assume X and Y are independent, with standard deviations 3 and 1, respectively. Find the standard deviation of W.
c) Suppose Q = (X-6)/3. Find the mean and standard deviation of Q.