whats probability that the mean duration of these pregnancies will be less 260

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ebgui1

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Description

assume that the duration od human pregnancies can be described by a normal model with a mean 266 days and standard deviation 16 days.  

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Explanation & Answer

Thank you for the opportunity to help you with your question!

First transform x=260 to z-score:  z=(260-266)/16=- 6/16= -.375

P(z<.375)= .3538

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