Question

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The probability that a random variable is greater than or equal to z standard deviations from the mean in a standard normal distribution is p%. What can be said with certainty about the probability that the random variable is less than or equal to –z standard deviations from the mean?
A.The probability is less than p%.
B.The probability is equal to p%.
C.The probability is greater than p%.
D.The probability is not equal to p%.