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25 June, 18:21

Suppose weight of a baby less than 2 months is normally distributed with mean 11.5 lbs and standard deviation 2.7 lbs, what proportion of babies weigh less than 11.07 lbs?

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  1. 25 June, 18:42
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    Step-by-step explanation:

    First calculate the z-score.

    z = (x - μ) / σ

    z = (11.07 - 11.5) / 2.7

    z ≈ - 0.16

    From a z-score table:

    P (z<-0.16) = 0.4364

    The proportion of babies that weigh less than 11.07 lbs is 0.4364.
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