You will learn how to use formulas and also the TI calculator to construct confidence intervals for a proportion.
You will be able to use the TI83/84 calculator to find the numerical value of a critical t score. You will learn to use the invT function for this.
You will be able to use the TI83/84 calculator to find a cofidence interval. You will use the TInterval function for this.
Calculate t(a/2) for a 95% CI using the TI 84 graphing calculator. If your TI is an older version, like 83 or 83+, and you do not have the invT function, watch the second video in this list before looking at this one.
This video shows how to construct a confidence interval for a proportion by using formulas and also by using the TI 83 graphing calculator.
This shows how to use TI to get the value of t(a/2) and how to use the TInterval function to calculate a confidence interval.