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If X is a normal random variable that has a mean of µ = 20 and...

If X is a normal random variable that has a mean of µ = 20 and a standard deviation σ = 2, (a) the standardized value of X=16 is _________. (b) What is the probability that X is less than or equal to 16? __________ (c) What is the probability that X is greater than 16? __________ (d) What is the probability that X is equal to 16?________

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