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You may need to use the appropriate appendix table or technology to answer this question. The average monthly electric bill of a random sample of 256 residents of a city is $117 with a standard deviation of $34. (a) Construct a 90% confidence interval for the mean monthly electric bills of all residents (in dollars). (Round your answers to the nearest cent.) to $ $ (b) Construct a 95% confidence interval for the mean monthly electric bills of all residents (in dollars). (Round your answers to the nearest cent.) to $ You may need to use the appropriate appendix table or technology to answer this question. The average monthly electric bill of a random sample of 256 residents of a city is $117 with a standard deviation of $34. (a) Construct a 90% confidence interval for the mean monthly electric bills of all residents (in dollars). (Round your answers to the nearest cent.) to $ $ (b) Construct a 95% confidence interval for the mean monthly electric bills of all residents (in dollars). (Round your answers to the nearest cent.) to $
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Answer rating: 100% (QA)
n 256 x 117 SD 34 Confidence interval c5 x 2 SD x Vn ... View the full answer
Related Book For
Statistics Unlocking the Power of Data
ISBN: 978-1118583104
1st edition
Authors: Robin H. Lock, Patti Frazer Lock, Kari Lock Morgan, Eric F. Lock, Dennis F. Lock
Posted Date:
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