Let X Be Normally Distributed with Mean μ and Standard

question 63

Multiple Choice

Let X be normally distributed with mean μ and standard deviation σ > 0. Which of the following is true about the z value corresponding to a given x value?

• A) A positive z = (x - μ)/σ indicates how many standard deviations x is above μ.
• B) A negative z = (x - μ)/σ indicates how many standard deviations x is below μ.
• C) The z value corresponding to x = μ is zero.
• D) All of the above.

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