Mathematics, 13.08.2020 21:01, kaishasenat1986
Find the minimum sample size needed to estimate the percentage of Democrats who have a sibling. Use a 0.1 margin of error, use a confidence level of 98%, and use the results from a prior Harris poll that gave a confidence interval of (0.44, 0.51) for the proportion of Democrats who have a sibling.
Answers: 3
from the normal distribution table 
![n =[ \frac { Z_{\frac{\alpha }{2} }}{E} ]^2 * \r p (1- \r p )](/tpl/images/0721/6680/300df.png)
![n =[ \frac { 2.33}{0.1} ]^2 * 0.475(1- 0.475 )](/tpl/images/0721/6680/17e9e.png)
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Find the minimum sample size needed to estimate the percentage of Democrats who have a sibling. Use...
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