SOLUTION: In a random survey of 226 college students, 20 reported being "only" children (with no siblings). Estimate with 95% confidence the proportion of students nationwide who are only ch

Question 370305: In a random survey of 226 college students, 20 reported being "only" children (with no siblings). Estimate with 95% confidence the proportion of students nationwide who are only children (please use the adjusted formula).
A. (0.022,0.189)
B. (0.058,0.134)
C. (0.096,0.203)
D. (0.194,0.265)

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Which of the following statements about confidence intervals is INCORRECT?

A. If we keep the sample size fixed, the confidence interval gets wider as we increase the confidence coefficient.
True
------------------
B. If the population standard deviation increases, the confidence interval decreases in width.
False
----------------------
C. If the confidence intervals for two means do not overlap very much, there is evidence that the two population means are different.
True
--------------
D. If we keep the confidence coefficient fixed, the confidence interval gets narrower as we increase the sample size.
True
---------------------
E. A confidence interval for a mean always contains the sample mean.
True
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Probability-and-statistics/370305 (2010-11-12 22:07:11): In a random survey of 226 college students, 20 reported being "only" children (with no siblings). Estimate with 95% confidence the proportion of students nationwide who are only children (please use the adjusted formula).
A. (0.022,0.189)
B. (0.058,0.134)
C. (0.096,0.203)
D. (0.194,0.265)
-----
None of those answers is correct.
It should be (0.05147,0.12552)
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Cheers,
Stan H.
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