
William W. answered 06/06/21
Top ACT Math Prep Tutor
If you have a TI-84 calculator, use "Z-Interval" (found by hitting the "stats" button, then "TESTS", then scroll to "ZInterval"
On "Inpt:" select "Stats"
Then enter the standard deviation and the mean and the number of sample.
For "C-level" type 0.95
Then hit "Calculate and you get your results.