Its believed that as many as 25% of adults over age 50 never graduated from high school.
Question:
a) How many of this younger age group must we survey in order to estimate the proportion of nongrads to within 6% with 90% confidence?
b) Suppose we want to cut the margin of error to 4%. What’s the necessary sample size?
c) What sample size would produce a margin of error of 3 %?
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a The sample size for 90 confidence with a 006 margin of err...View the full answer
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Related Book For 
Business Statistics
ISBN: 9780321925831
3rd Edition
Authors: Norean Sharpe, Richard Veaux, Paul Velleman
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