Standard Deviation (SD) - CASIO
support.casio.com › standard_deviationStandard Deviation (SD) Use the key to enter the SD Mode when you want to perform statistical calculations using standard deviation. (SD) In the SD Mode and REG Mode, the key operates as the key. fx-82MS/fx-85MS/fx-300MS/fx-350MS: Always start data input with (CLR) (Scl) to clear statistical memory. fx-220 PLUS: Always start data input with (Scl) to clear statistical memory.