According to the U.S. Fire Administration, approximately 25,000 fires are caused by fireworks each year in the United States. Despite numerous public warnings against the use of fireworks, the home property damage due to these fires is enormous. In a random sample of 55 fires due to fireworks, the resulting mean property damage was $850.25. The sample standard deviation is $340.25. Assume property damage due to fireworks is normally distributed. Calculate a 90% confidence interval for the true mean property damage due to a fire caused by fireworks. Make sure to check appropriate conditions and to interpret your interval in context.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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According to the U.S. Fire Administration, approximately 25,000 fires are caused by
fireworks each year in the United States. Despite numerous public warnings against the use
of fireworks, the home property damage due to these fires is enormous. In a random sample
of 55 fires due to fireworks, the resulting mean property damage was $850.25. The sample
standard deviation is $340.25. Assume property damage due to fireworks is normally
distributed. Calculate a 90% confidence interval for the true mean property damage due to a
fire caused by fireworks. Make sure to check appropriate conditions and to interpret your
interval in context.
Transcribed Image Text:According to the U.S. Fire Administration, approximately 25,000 fires are caused by fireworks each year in the United States. Despite numerous public warnings against the use of fireworks, the home property damage due to these fires is enormous. In a random sample of 55 fires due to fireworks, the resulting mean property damage was $850.25. The sample standard deviation is $340.25. Assume property damage due to fireworks is normally distributed. Calculate a 90% confidence interval for the true mean property damage due to a fire caused by fireworks. Make sure to check appropriate conditions and to interpret your interval in context.
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