# Confidential Intervals

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A large population of overdue bills has balances that follow a normal curve. When we take a sample of 100 of these these average is $500 and the SD is $100. (a)What statement can you make about the range $300 to $700? (b)What statement can you make about the range $480 to $520?

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A large population of overdue bills has balances that follow a normal curve. When we take a sample of 100 of these average is $500 and the SD is $100. (a)What statement can you make about the range $300 to $700? (b)What statement can you make about the range $480 to $520?

(a)What statement can you make about the range $300 to $700?

Mean=M = $500

Standard deviation =s= $100

sample size=n= 100 ...

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