stats confidence intervals

Jun 27th, 2015
SKTFaker
Category:
Statistics
Price: $5 USD

Question description

  1. Confidence Interval – proportion -A study by the University of Michigan found that one in five 13 and 14 years olds is a sometime smoker.  To see how the smoking rate of the students at a large school district compared to the national rate, the superintendent surveyed two hundred 13 and 14 year old students and found that 23% said they were sometimes smokers.  Find the 95% confidence interval of the true proportion and compare this with the University of Michigan’s study.

  1. What is p? ______

  2. Find p and q

  3. Find critical value, α.

  4. Find margin of error:

  5. Find the confidence interval: CI = P

  6. Write the conclusion.


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(Top Tutor) Daniel C.
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