SOLUTION: Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean equals μ=221 days and standard deviation σ=12 days.
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Question 1083585: Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean equals μ=221 days and standard deviation σ=12 days.
What is the probability that a randomly selected pregnancy lasts less than 217 days?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z<(x-mean)/sd=(217-221)/12=-4/12=-0.333
probability is 0.3694
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