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What percentage of pregnancies should last between

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Reference no: EM132047846

Assume that the distribution of the duration of pregnancies has a normal distribution with a mean of 266 days and a standard deviation of 16 days

a) What percentage of pregnancies should last between 260 and 280 days?

b) Find a value x so that 10% of the pregnancies of a duration that is longer than x days.

Reference no: EM132047846

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