SOLUTION: If the random variable z is the standard normal score and a > 0, is it true that P(z < -a) = P(z > a)? Why or why not?
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Question 488814: If the random variable z is the standard normal score and a > 0, is it true that P(z < -a) = P(z > a)? Why or why not? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! If the random variable z is the standard normal score and a > 0, is it true that P(z < -a) = P(z > a)? Why or why not?
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Ans: Yes, because of the symmetry of the normal curve.
P(x > a) = P(x < -a)
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Cheers,
Stan H.
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