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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.
10
References the Casio FX-65 User’s Guide Casio FX-65 Fraction calculator