## Confidence Intervals for Proportions and Means

The resources below were chosen to align with the Clackamas Community College statistics curriculum.

 Topic Web page Video Other Estimating population parameters Inferential statistics SurfStat Australia Point and interval estimates StatTrek Confidence level STEPS Project, U of Glasgow Point and interval estimates onlinestatbook.com Confidence Interval for One Population Proportion Confidence interval for a population proportion StatTrek Checking conditions for a confidence interval for a population proportion brucesimmons.com Excel: Calculating z* using NORMSINV brucesimmons.com Calculating a confidence interval for a population proportion brucesimmons.com Interpreting a confidence interval for a population proportion brucesimmons.com Confidence Interval for the Difference of Two Population Proportions Confidence Interval for the Difference of Two Population Proportions StatTrek Checking conditions for a confidence interval for the difference of population proportions brucesimmons.com Calculating and interpreting a confidence interval for the difference of population proportions brucesimmons.com Estimating the Population Mean The sample mean Little Handbook of Statistical Practice Biased vs unbiased estimators onlinestatbook.com Sample and population means Khan Academy Student's t Distribution Degrees of freedom onlinestatbook.com The t distribution onlinestatbook.com Degrees of freedom (video) onlinestatbook.com The t distribution (video) onlinestatbook.com Interactive web page: Comparing the normal and t distributions onlinestatbook.com Confidence Interval for a Population Mean, Concept Estimating a population mean onlinestatbook.com Simulation: Meaning of confidence level onlinestatbook.com Confidence Interval for a Population Mean, Calculations Confidence interval for a population mean StatTrek Confidence interval for a population mean onlinestatbook.com Checking conditions for a confidence interval for a population mean brucesimmons.com Excel: Calculating and interpreting a confidence interval for a population mean brucesimmons.com Confidence Interval for the Mean of Paired Differences Confidence interval for the mean of paired differences StatTrek Checking conditions for a confidence interval for the mean of paired differences brucesimmons.com Excel: Calculating a confidence interval for the mean of paired differences brucesimmons.com Interpreting a confidence interval for the mean of paired differences brucesimmons.com Confidence Interval for the Difference of Means Confidence interval for the difference of means StatTrek Checking conditions for a confidence interval for the difference of means brucesimmons.com Excel: Calculating and interpreting a confidence interval for the difference of means, unpooled brucesimmons.com Excel: Calculating and interpreting a confidence interval for the difference of means, pooled brucesimmons.com Topic Web page Video Other