Statistics! Find the minimum sample size

Mathematics
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A researcher wishes to estimate, with 90% confidence, the proportion of people who own a home computer. A previous study shows that 40% of those interviewed had a computer at home. The researcher wishes to be accurate within .02 of the true proportion. Find the minimum sample size necessary.

Jun 3rd, 2015

Please let me know if you need any clarification. I'm always happy to answer your questions.

estimated value=90%

value of those who have computers=40%

accurate range=0.02

40/90

=0.44

0.44-0.02

=0.42

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 3rd, 2015

Awesome! So the minimum sample size is 0.42 correct?

Jun 3rd, 2015

In a poll taken in March 2007, Gallup asked 1006 adults whether they were baseball fans and 362 adults said they were. Construct a 95% confidence interval for the true proportion of adults that are baseball fans.

Jun 3rd, 2015

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