Casio FX 65 - Manual (Page 10)

FX 65 Training guide
Statistics
Entering and analyzing statistical data
[SHIFT] [STAT]
Enters the statistics mode.
[COMP]
Exits the statistics mode. Note that all input data is deleted.
[SHIFT] [SAC]
Clears statistical memory. Be sure to perform this operation
before inputting new data.
[DATA] Inputs the displayed value as data. Press [DATA] twice to input
two entries of the same value. (NOTE: This is the “M+” key).
[SHIFT] [DEL]
Deletes the displayed value as data.
Note: You can input multiple entries of the same data using [x].
To input 100 ten times, press [100] [x] [10] [DATA].
After entering data, you can retrieve the following values:
[SHIFT] [
σ n -1 ] Sample standard deviation.
[SHIFT] [
σ n]
Population standard deviation.
[SHIFT] [ x ] Arithmetic mean.
[SHIFT] [n]
Number of data items.
[SHIFT] [
∑x]
Sum of data.
[SHIFT] [
∑x 2
] Sum of the squares.
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References the Casio FX-65 User’s Guide Casio FX-65 Fraction calculator