Q40
Let X be a random variable following normal distribution with mean +1 and variance 4. Let Y be another normal variable with mean -1 and variance unknown. If P(X ≤ -1) = P(Y ≥ 2) the standard deviation of Y is
A.
3
AnswerB.
2
C.
√2
D.
1
Answer: Option A
Solution
Answer: Option A
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