SOLUTION: In a survey of 9000 women, 6431 sy they change their nail polish once a week. Construct a 95% confidence interval for the population proportion of women who change their nail polis

Question 763999: In a survey of 9000 women, 6431 sy they change their nail polish once a week. Construct a 95% confidence interval for the population proportion of women who change their nail polish once a week

9000/6431=1.4
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
In a survey of 9000 women, 6431 sy they change their nail polish once a week. Construct a 95% confidence interval for the population proportion of women who change their nail polish once a week
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sample proportin = p-hat = 6431/9000 = 0.71
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ME = 1.96*sqrt[0.71*0.29/9000] = 0.0094
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95% CI: 0.71-0.0094 < p < 0.71+0.0094
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Cheers,
Stan H.
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