Question: how to calculate standard deviation in casio fx-991ex?
Answer: Casio fx-991ES.
Press to get to the statistics calculation screen. Press (STAT) to see the number of total data points. Press. (STAT) to see the mean x . Press. (STAT) to see the standard deviation. −
nx. σ
.
STAT. SHIFT. = AC. SETUP. arrow keys. MODE.