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Ahat [919]
3 years ago
11

An earlier study determined that 60% of women aged over 50 have annual mammograms. To see if this proportion is still valid we s

end surveys to 400 women aged over 50. Of the 60 who respond, 48 say they have annual mammograms. Use the " Plus Four" method to estimate the current proportion of women aged over 50 who say they get annual mammograms with a 95% confidence interval. (round to the 4th decimal place)
Social Studies
1 answer:
Rus_ich [418]3 years ago
3 0

Answer:

The required confidence interval is (0.68 , 0.8825)

Explanation:

n=48

Confidence interval 95%

Method p = 48+2 / 60+4 = 0.781250

SE = \sqrt{p*(1-p)/60+4} = 0.0516748

confidence interval p ± 1.95996*\sqrt{p*(1-p)/60+4} = (0.679969,0.882531)

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