Consider two populations P1 and P2. Suppose P1 and P2 are normally distributed. From P1, we take a random sample A of si

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answerhappygod
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Consider two populations P1 and P2. Suppose P1 and P2 are normally distributed. From P1, we take a random sample A of si

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Consider two populations P1 and P2. Suppose P1 and P2 are
normally distributed. From P1, we take a random sample A of size
25, and we obtain the mean of 93 and the standard deviation of 5.
From P2, we take a random sample B of size 30, and we obtain the
mean of 174 and the standard deviation of 9. If Z = A + B,
determine the standard deviation of Z.
With respect to problem 4 above, find the probability that Z is
less than 260.
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