SOLUTION: Please Help Someone!
Find the indicated probability or percentage for the normally distributed variable.
The lengths of human pregnancies are normally distributed with a mean of
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-> SOLUTION: Please Help Someone!
Find the indicated probability or percentage for the normally distributed variable.
The lengths of human pregnancies are normally distributed with a mean of
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Question 964684: Please Help Someone!
Find the indicated probability or percentage for the normally distributed variable.
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 pregnancy lasts at least 300 days? Answer by rothauserc(4718) (Show Source):
You can put this solution on YOUR website! We want the Probability (X < 300)
First calculate the z-score
z-score = X - mean / std dev = (300 - 268) / 15 = 2.133333333 approx 2.13
now consult the table of z-scores for the probability associated with a z-score of 2.13
Probability (X < 300) = 0.9834 approx 0.98
