The Census Bureau of the US Department of Commerce estimated that average e-commerce sales for US retailers
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The Census Bureau of the US Department of Commerce estimated that average e-commerce sales for US retailers in the second quarter of 2011 had increased by 3.0 percent from the first quarter of 2011. Along with the estimate, a margin of error of 1.2 percent (at the 95% confidence level) was reported.
a. Show the upper and lower bounds for the 95% confidence interval.
b. What would the margin of error be for a 90% confidence level?
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Population All US retailers Characteristic of Interest th...View the full answer
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Sultan Ghulam Dastgir
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Related Book For 
Understanding Business Statistics
ISBN: 978-1118145258
1st edition
Authors: Stacey Jones, Tim Bergquist, Ned Freed
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