Do senior citizens and college students have different memories about high school? The activity Confidence Intervals: 2-Sample Proportions involves investigating random samples from two populations from a large Midwestern city with respect to the question: "When you were in high school, did you have a hero?" How can responses from two random samples from each population be used to estimate the responses of all senior citizens and all college students in this city?

This activity investigates generating a confidence interval for the mean of a random sample of size 100 from an unknown population.

This lesson involves the concept of confidence intervals as a tool to make statements about a population proportion based on a given sample.

Students will interpret a confidence level as the average success rate of the process used to produce an interval intended to contain the true mean of the population. Students will recognize that as the confidence level increases, on average, the confidence interval increases in width.

This activity involves generating a confidence interval for a population proportion from a random sample of size 100 and considering how certain one can be that this interval contains the actual population proportion.

This activity investigates the margin of error for a confidence interval and the relationship between sample size and the margin of error.

This lesson involves investigating the confidence interval and hypothesis test for the slope of a regression line.