A pollster is going to sample a number of voters in a large city and construct a 95% confidence interval for the proportion who support the incumbent candidate for mayor. Find a sample size so that the margin of error will be no larger than 0.05. Be sure to round up to the next whole number. The required sample size is X 3

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A: Given that  Margin of error =E =0.04 Sample proportion p^=0.45

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A: Givenconfidence level=95%Margin of error(E)=0.04sample proportion(p^)=0.78

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A: n=47, sample mean =111.62, standard deviations=11.42

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Q: Use the confidence interval to find the margin of error and the sample mean. (0.614,0.790

A: Given, Lower limit=0.614 Upper limit=0.790 margin of error=?

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A: Given  CI for μ is (-11,10) Farmula used Length of CI =2* Zc* s/√n

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