Answered: d their candidate. State your answers…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

A political campaign wants to construct a 99% confidence interval for the proportion of likely voters who support their candidate. Of the 619 randomly selected likely voters surveyed, 305 supported their candidate. State your answers as percents rounded to 1 decimal place.

With 99% confidence the proportion of all likely voters who supported their candidate is between ___% and ___%.

Expert Solution

Step 1

Here it is given that -

Of the 619 randomly selected likely voters surveyed, 305 supported their candidate.

So,

Sample proportion (p) = $\frac{305}{619}$ =0.49

q = 1-p = 1-0.49 = 0.51

Total number of sample (n) = 619

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