Question
A medical researcher wishes to determine the percentage of females who take vitamins. He wishes to be 99% confident that the estimate is within 2%
A medical researcher wishes to determine the percentage of females who take vitamins. He wishes to be 99% confident that the estimate is within 2% percentage points of the true proportion. A recent study of 180 females showed that 25% look vitamins.
a. How large should the sample size be?
b. If no estimate of the sample proportion is available, how large should the sample be?
Step by Step Solution
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The 99 confidence interval for population is calculated by using the f...
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Step: 2
Step: 3
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Elementary Statistics A Step By Step Approach
Authors: Allan Bluman
8th Edition
73386103, 978-0073386102
