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Statistics, 3E by Fatma Abdel-Raouf, Robert A. Donnelly

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CHAPTER14

Confidence Intervals

In This Chapter

  • Interpreting the meaning of a confidence interval
  • Calculating the confidence interval for the mean when the population standard deviation is known and when it is unknown
  • Introducing the Student’s t-distribution
  • Calculating the confidence interval for the proportion
  • Determining sample sizes to attain a specific margin of error

Now that we have learned how to collect a random sample and how sample means and sample proportions behave under certain conditions, we are ready to put those samples to work using confidence intervals.

One of the most important roles that statistics plays in today’s world ...

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