Statistics
Activity:
Estimating a Population Proportion
Posted on Feb 11, 2010
Topic: Inferential Statistics
Students find the confidence interval for a population proportion by first finding the critical value and the margin of error.
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Activity Key Steps:
In Problem 1, students are to find the critical value, the margin of error, and the intervals at both the 95% and 99% level. Critical values are found by using the invNorm command to find the area to the left of that value.
Students can then use their handheld to compute the Confidence Interval without finding critical value and margin of error. They will be able to check their work using the 1-Prop z Interval command.
In the second part of this activity, students will apply what they have learned to evaluate the claims about estimated population proportions by first finding the confidence interval.
In the last part of the activity, students will determine the sample size need for estimating the population proportion with and without an estimate of the sample population proportion.