Question

Express the confidence interval 73%<p<88%73%<p<88% in the form of ˆp±ME

Answer #1

Solution :

confidence interval 73%<p<88%

confidence interval 0.73 <p< 0.88

Point estimate = = (Lower confidence interval + Upper confidence interval ) / 2

Point estimate = = (0.73 + 0.88) / 2

Point estimate = = 0.805

Point estimate = = 80.5%

Margin of error = ME = Upper confidence interval -

Margin of error = ME = 0.88 - 0805

Margin of error = ME = 0.075

Margin of error = ME = 7.5%

Express the confidence interval in the form of ± ME

80.5% ± 7.5%

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Please find the 98% confidence interval for the true proportion of
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