Lec 12a Confidence Intervals

Lec 12a Confidence Intervals

1. Margin of Error (MOE)

   • Sample mean
   • sample proportion
   • review
     • Z Values and Probability
     • Standard Error of the Sample Mean
       • For a mean, a sampling distribution is
         • An expected value of the sample mean:
         • A standard error of the sample mean:
       • For a proportion, a sampling distribution is
         • An expected value of the sample proportion:
         • A standard error of the sample proportion:
     • Bringing them together: the Margin of Error

2. Confidence Interval (CI)

   • The Estimate of the Sample Mean (Review)
   • Bringing Sample Mean and MOE together: the Confidence Interval
   • For Population Mean
   • For Population Proportion:

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