How do you turn frequency on when in the stats table mode on a casio fx-9750gii?

There is no such thing as turning the frequency on on the Casio calculators. Just enter your data in lists. Choose one List where you put the frequency information. When you want to GRAPH or perform CALCulations you have a TAB labeled SET corresponding to key F6:SET. When you press F6, a new screen open where you assign the list to the variables.
Here are a few screen captures to help you.



Press F2:CALC (or F1 Graph). The Tab SET appears at the bottom of screen



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Higlight the line 1-Var Freq (or 2-Var Freq). The bottom of screen shows F1:1 and F2:LIST. If frequencies are not equal to 1, press F2:LIST to assign the frhow do you turn frequency - k24674_71.jpg I entered 2.



List2 is now the frequency list.


Press EXE to perform stats.



See that n=19.