SOLUTION: Weights of bear cubs in maine are approximately normally distributed with a mean of 42.3 pounds and standard deviation of 6.8 pounds. Let X be the weight of a bear cub checked duri

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Question 586454: Weights of bear cubs in maine are approximately normally distributed with a mean of 42.3 pounds and standard deviation of 6.8 pounds. Let X be the weight of a bear cub checked during this year's bear count. What is the probability that:
A. X<45
B. X>42
C. 40
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Weights of bear cubs in maine are approximately normally distributed with a mean of 42.3 pounds and standard deviation of 6.8 pounds. Let X be the weight of a bear cub checked during this year's bear count. What is the probability that:
A. X<45
z(45) = (45-42.3)/6.8 = 0.3971
P(x<45) = P(z<0.3971) = 0.6543
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B. X>42
z(42) = (42-42.3)/6.8 = 0.0441
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P(x>42) = P(z>0.0441) = normalcdf(0.0441,100) = 0.4824
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C. 40
??
Cheers,
Stan H.