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l._ .7=.=,. l A random sample of 51 Ontario households using natural gas heating shows that the mean monthly consumption of natural gas is 172.95

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l._ .7=.=,. l A random sample of 51 Ontario households using natural gas heating shows that the mean monthly consumption of natural gas is 172.95 cu. Ft., with a standard deviation of 30.48 cu. Ft. find a 90% confidence interval for the mean monthly consumption for the population of all Ontario households. (round your answer to 2 decimal places)

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