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Problem 4 A study of 250 randomly selected smokers who tried to quit smoking with nicotine...

Problem 4

  1. A study of 250 randomly selected smokers who tried to quit smoking with nicotine patch therapy is conducted. After the study, it is found that 60% are still smoking a year later. Use a 5% significance to test the statement that among smokers who try to quit with nicotine patch therapy, less than 75% are still smoking a year later. Please include your requirements, null and alternative hypotheses, test statistic (show equation), p-value, decision rule and conclusion.
  2. Recalculate the p-value using normalcdf. Show your graph and calculator commands.
  3. Build a 90% confidence interval using your calculator and decide if you can conclude the same. Explain.

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Expert Solution

milcah answered 1 year ago
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