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An 80% confidence interval for a proportion is found to be (0.27, 0.33). What is the sample proportion?

User Hezye
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Solution

For this case the confidence interval is given by:

(0.27; 0.33)

We can find the estimaed proportion in the following way:


p=(0.27+0.33)/(2)=0.30

then the sample proportion would be 0.30

User Daniel GL
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