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aliina [53]
3 years ago
5

From a random sample of potential voters in an upcoming election 47% indicated they intended to vote for candidate R A 95 percen

t confidence interval was constructed from the sample and the margin error for the estimate was 5%
Advanced Placement (AP)
1 answer:
iragen [17]3 years ago
7 0

<u>Answer:</u>

The 95% confidence intervals of given margin error

(0.42 , 0.52)

<u>Explanation:</u>

<u>Step 1</u>:-

The 95% confidence intervals of given margin error

x⁻ ± M.E

The 95% confidence intervals of given margin error

  ( x^{-} - \frac{2s}{\sqrt{n} }        , (x^{-} +\frac{2s}{\sqrt{n} },)

Now given  random sample of potential voters in an upcoming election 47%

That is The sample of the mean  ( x⁻ ) = 0.47

the margin error for the estimate was  5%

That is  margin error of the sample M.E = \frac{2s}{\sqrt{n} } = 5% =0.05

<u>Step 2</u>:-

The 95% confidence intervals of given margin error

  ( x^{-} - \frac{2s}{\sqrt{n} }        , (x^{-} +\frac{2s}{\sqrt{n} },)

(0.47 -0.05,0.47+0.05})

(0.42 , 0.52)

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