Suppose a normal distribution
SAT SCORES: The national average SAT score is 1019. If we suppose a normal distribution with Q=90,
(a) What is the 90th percentile score?
(b) What is the probability that a randomly selected score exceeds 1200?
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At a drive through window of a bank it's found that ten customers get served every 15 minutes. The bank's manage is interested in determining a way to raise the number of customers which can be served. He thought that knowing the probability of se
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An auditor wants to determine what proportion of bank's commercial loan files are incomplete. The auditor randomly samples 60 files and finds 12 are incomplete. Using 95% confidence interval, estimate the true proportion of incomplete files for AL
A nursing school wants to determine the true mean annual income of its alumni. It randomly samples 120 of its alumni. The mean annual income was $58,700 with a standard deviation of $1,500.
Claim: µ = 978. Sample data: n = 23, = 934, s = 30. The sample data appear to come from a normally distributed population with s = 30.
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In a particular area, there are just three makes of cars available: Ford (60% of the total), Renault (30%) and Honda (10%). The carburetors on Fords have a 0.09 probability of failure, those on Renaults have a 0.05 chance and those on Hondas have
How priority of different security holders in bankruptcy liquidation affects needed rate of return on different securities. Or we can say, why ond investors have lower required rates of return than stock investors?
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