Delta manual FX 300 MS Training guide Standard Deviation

FX 300 MS Training guide

Standard Deviation

Use the [MODE] key to enter the Standard Deviation (SD) mode when you want to perform statistical calculations using standard deviation. [MODE] [2]

•To clear statistical memory, press [SHIFT] [CLR] [1] [=].

•To enter data, use the following key sequence: <value> [DT]

•Input data is used to calculate the following values:

Sum of the squares (∑ x2)	[SHIFT] [S-SUM] [1]
Sum of data (∑ x)	[SHIFT] [S-SUM] [2]
Number of data items (n)	[SHIFT] [S-SUM] [3]
Mean of the data	[SHIFT] [S-VAR] [1]
Population standard deviation σ n	[SHIFT] [S-VAR] [2]
Sample standard deviation σ n-1	[SHIFT] [S-VAR] [3]

Key points to note:

•[DT] [DT] inputs the same data twice

•You can input multiple entries of the same data using [SHIFT] [;]. To input 100 ten times, press [100] [SHIFT] [;] [10] [DT]

•You can scroll through the data you entered using the up and down arrows on the REPLAY button.

•You can edit the displayed data by inputting a new value and then pressing the [=] key to replace it. If you use the [DT] key (and not the [=] key), this will register the value you input as a new data item and will leave the old value as is.

•If you want to perform statistical calculations, always press the [AC] key first to exit the data display.

•To delete a data value that is displayed, press [SHIFT] [CL].

•If you switch to another MODE, you will no longer be able to display or edit your data.

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References the Casio FX-300 MS User’s Guide Casio FX-300MS Scientific calculator