Question
Asked Nov 19, 2019
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Out of 300 people sampled, 78 preferred Candidate A. Based on this, estimate what proportion of the entire voting population (p) prefers Candidate A.

Use a 99% confidence level, and give your answers as decimals, to three places.

 ____< pp < ______

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Expert Answer

Step 1

From the given information,

Out of 300 people sampled, 78 preferred candidate A.

            So, here n= 300, x=78

Step 2

Formula for confidence interval for population proportion is,

CI P E
here, E marginoferror
P 1-P)
E Zx
For 99% confidence level z-value is 2.58
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CI P E here, E marginoferror P 1-P) E Zx For 99% confidence level z-value is 2.58

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Step 3

        &n...

X
Population proportion P
n
78
300
P-0.26
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X Population proportion P n 78 300 P-0.26

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