P(x < 9700 = P( z < (970 - 975)/245) = P(z < -0.02). = 0.4920
Monica M.
asked 07/09/21Find the probability that a single randomly selected value is less than 970 dollars. P(X < 970) =
CNNBC recently reported that the mean annual cost of auto insurance is 975 dollars. Assume the standard deviation is 245 dollars. You take a simple random sample of 85 auto insurance policies.
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