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Mathematics, 06.04.2021 05:00 stdias

The average natural gas bill for a random sample of 21 homes in the 19808 zip code during the month of February was $311.90 with a sample standard deviation of $51.60. Based on the sample, construct a 90% confidence interval for the true mean natural gas bill for homes in the 19808 zip code area in February.

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The average natural gas bill for a random sample of 21 homes in the 19808 zip code during the month...
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