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.
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.