Question

The lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days and a standard deviation of 13 days. A distribution of values is normal with a mean of 261 and a standard deviation of 13.

What percentage of pregnancies last beyond 252 days?
P(X > 252 days) =  %

Enter your answer as a percent accurate to 1 decimal place (do not enter the "%" sign). Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.​

Answer 1

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