DOTATHE MATICAL ASSOCIATION OF AMERICA webwork /m1231-01-1a17 I chapter 8 12 ts

Question

DOTATHE MATICAL ASSOCIATION OF AMERICA webwork /m1231-01-1a17 I chapter 8 12 ts Chapter 8: Problem 12 Prevous Probdem Problerm List Next Problem (1 point) A poll is taken in which 339 out of 600 randomly selected voters indicated their preference for a certain candidate (a) Find a 99% confidence interval for p 12 ems (b) Find the margin of error for this 99% confidence interval for p. 1.455 (c) Without doing any calculations, indicate whether the margin of error is larger or smaller or the same for an 80% confidence interval O A. larger B. smaller O C. same PART I....ppt here to search

Explanation / Answer

The statistical software output for this problem is:

One sample proportion summary confidence interval:
p : Proportion of successes
Method: Standard-Wald

99% confidence interval results:

Hence,

a) 99% confidence interval for p:

0.5129 < p < 0.6171

b) Margin of Error = (0.6171 - 0.5129)/2 = 0.0521

c) Smaller

Proportion Count Total Sample Prop. Std. Err. L. Limit U. Limit p 339 600 0.565 0.020239195 0.51286729 0.61713271

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