Births with gestation time of 258 days or less are regarded, Ask an Expert

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It has been established that length of gestation until birth for pregnant women is random variable which is well modeled by Normal distribution with mean μ = 282 days and standard deviation σ = 11 days.

Births with gestation time of 258 days or less are regarded to be premature births. Determine the probability that randomly selected pregnant woman will give birth to premature baby?

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