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The lengths of human pregnancies are normally distributed with a mean of =268 days and a standard deviation of =15 days. What is the probability

The lengths of human pregnancies are normally distributed with a mean of =268 days and a standard deviation of =15 days. What is the probability that a randomly selected pregnancy will lastless thanX = 270 days?

Find the z-score and then the probability that X isless than270.

Write the z-score rounded to 2 places and the probability as a decimal rounded to 4 places.

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