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Determine the sample size needed to estimate the average weight of all second-grade boys if we want to be within 1 pound with 90% confidence.
- Determine the sample size needed to estimate the average weight of all second-grade boys if we want to be within 1 pound with 90% confidence. Assume we know that the standard deviation of such weights is 3 pounds. Round the sample size UP to the nearest whole number.
z90=______________
standard deviation =______________
margin of error =_____________
n =____________
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College Algebra
Authors: Mark Dugopolski
5th Edition
0321899822, 9780321899828
