A. A polling agency wants to decide, with 90% confidence, how many voters to poll to estimate the percentage in favor of extending tax cuts with a margin of error of no more than 1.8%. B. A librarian wants to find how many books he should sample in the college

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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Find the sample size for each scenario.
A. A polling agency wants to decide, with 90% confidence, how many voters to
poll to estimate the percentage in favor of extending tax cuts with a margin of
error of no more than 1.8%.
B. A librarian wants to find how many books he should sample in the college
library to estimate the mean age of the collection with a margin of error of no
more than 2. Past research showed that the standard deviation of the mean
age a decade ago was 15.5 years.
Important:
• Show your work on your scratch paper and number your scratch work with this
question number.
. Remember to round appropriately.
Transcribed Image Text:Find the sample size for each scenario. A. A polling agency wants to decide, with 90% confidence, how many voters to poll to estimate the percentage in favor of extending tax cuts with a margin of error of no more than 1.8%. B. A librarian wants to find how many books he should sample in the college library to estimate the mean age of the collection with a margin of error of no more than 2. Past research showed that the standard deviation of the mean age a decade ago was 15.5 years. Important: • Show your work on your scratch paper and number your scratch work with this question number. . Remember to round appropriately.
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