STEP-BY-STEP TECHNOLOGY GUIDE: Estimating the Mean, Variance, and Standard Deviation for Grouped Data
- Step 1 Press STAT and select 1 : Edit. Enter the class midpoints in L1 and the frequencies or relative frequencies in L2.
- Step 2 Press STAT, select the CALC menu, and choose 1: 1-Var Stats.
- Step 3 Press 2nd 1 Comma 2nd 2, so that the following appears on the home screen: 1-Var Stats L1, L2.
- Step 4 Press ENTER.