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Mean and standard deviation
Casio Fx-83GT PLUS
Mean
Shift, set-up, down arrow, 3 (stat), freq? 1 (on). Then...
Mode STAT (which is 2) then 1 (which is 1-var)
Once you see the table to input all your values. Then...
AC, shift, 1 (the STAT button), choose 4 (var), then choose 2 (the mean button – the x with the hat on..)
You get 3 for the mean (if you use the values in the table below).
Standard deviation
AC shift 1 4 3(for standard deviation)
You get 1.154700538 for the standard deviation
Numbers to enter into your table and their frequencies:
value frequency
1 1
2 2
3 3
4 2
5 1