Home Forums Math For a standard normal distribution, which of the following expressions must always be equal to 1? Reply To: For a standard normal distribution, which of the following expressions must always be equal to 1?

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shilpav
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    The correct answer is
    D. P(z<-a) + P(-a<z<a) + P(Z>a)

    Explanation:
    This expression represents all of the possible values in a curve, or in other words, the total area of a curve. According to a standard normal distribution, the total area of a curve is always equal to 1 as it is a probabilistic distribution.

    • This reply was modified 2 years, 9 months ago by ProtonsTalk.
    • This reply was modified 2 years, 9 months ago by ProtonsTalk.
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