In an NBC News/Wall Street Journal poll of 1,000 American adults conducted August 59, 2010, 44% of
Question:
a. Compute the 90% confidence interval for the proportion of Americans who approved of Barack Obama’s handling of the economy.
b. What is the resulting margin of error?
c. Compute the margin of error associated with a 99% confidence level.
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Related Book For
Essentials Of Business Statistics Communicating With Numbers
ISBN: 9780078020544
1st Edition
Authors: Sanjiv Jaggia, Alison Kelly
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