Activity Overview
Students understand the confidence intervals for a proportion and for a mean. They also examine the confidence intervals for the difference between two means, and for the difference between two proportions.
Before the Activity
Install the Statistics with List Editor application on the calculator using one of these two methods:
TI Connect™, a TI Connectivity Cable, and the Unit-to-Unit Link Cable
TI-Navigator™ "send to class" feature
See the attached PDF file for detailed instructions for this activity
Print pages 137 - 148 from the attached PDF file for your class
During the Activity
Distribute the pages to your class.
Follow the Activity procedures:
Enter, for a population, the number of successes, sample size, and the confidence level
View the confidence interval and study the margin of error
Enter functions to generate the number of successes for a given sample size, to determine the confidence interval, and to display results
Observe that the results include the population value in the confidence interval for a proportion
Enter another data set as a list
Calculate a 'z' interval, if the standard deviation is known
Calculate a 't' interval, if the standard deviation is not known
Determine, by both methods, the confidence interval for a mean, and the margin of error
Note that both techniques give the same result
Determine Large Sample Confidence Intervals for the difference between two proportions and difference between two means
After the Activity
Review student results:
As a class, discuss questions that appeared to be more challenging
Re-teach concepts as necessary