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Every year, around Halloween, many street signs in a small city are defaced. The average repair cost per sign is $68.00 and the standard deviation is $12.40 (a) If 300 signs are damaged this year, there is a 5% chance that the total repair costs for the 300 signs will exceed what value? (b) You are about 68% certain that the total repair costs for 300 signs will fal within what interval centered around $20,400?
math   Statistics-And-Probability   
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Answer #1

1-pfx-68 >缶ー6:8〉/12.aj. σ 12 4 치300 .-68-21, 6as 12: 4 rASX12. 4) +68|3ơo 26,51 9.4 0M- 千26,519.1.Qccusa uu A6, Hoe μ2@gYず20400 , 6-1.29. he t ina u (20, 383-6, 204124) Con)

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