SOLUTION: A normal distribution has a mean of 50 and a standard deviation of 6. What is the probability that a value selected at random from this data is at least 38? a) 99.5% b)81.5% c)

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Question 880877: A normal distribution has a mean of 50 and a standard deviation of 6. What is the probability that a value selected at random from this data is at least 38?
a) 99.5% b)81.5% c) 85% d.97.5%
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
*Note: z+=+blue%28x+-+mu%29%2Fblue%28sigma%29
P(x ≤ 38) = P(z ≤ 12/6) = p(z ≤ 2)= 97.73% Use table etc