<PRE><B>Question 674158</B>
A recent survey showed that among 100 randomly selected college seniors, 20 plan to attend graduate school and 80 do not. Determine a 68 % confidence interval for the population proportion of college seniors who plan to attend graduate school. (Enter each answer rounded to three decimal places.)
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p-hat = 20/100 = 1/5
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ME = z*s = 0.9945*sqrt[(1/5)(4/5)/100] = 0.0398
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68% CI: 0.2-0.0398 &lt; p &lt; 0.2+0.0398
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cheers,
Stan H.
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