Question: andom sample X1,X2,..X1s with size 15 is selected from a population that S0,15). Another independent random sample Y1,Y2,..,Y10 with size 10 is Bd from

andom sample X1,X2,..X1s with size 15 is selected from a population that

andom sample X1,X2,..X1s with size 15 is selected from a population that S0,15). Another independent random sample Y1,Y2,..,Y10 with size 10 is Bd from a population that is N(40,10*). Let X be the average of the first cumple and Ybe the average of the second sample. Then P(X-Y

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