# Chapter 4. Modes

# 4.1. Statistical Mode

Press F3 to toggle between statistical and trigonometry mode. Alternatively bring up the configuration dialog by pushing the KCALC button or by pressing F2 to switch into statistics mode.

N

  Recall the number of data items entered

INV N

  Display the sum of all data items entered

Mea

  Display the mean of the data items entered

INV Mea

  Display the sum of the square of all data items entered

Std

  Display the standard deviation (n)

INV Std

  Display the population standard deviation (n-1)

Med

  Display the median

Dat

  Enter a data item

INV Dat

  Clear last data item entered

Cst

  Clear all data item entered