After you are in the statistics mode and cleared the statistics memories, the keystrokes required are:
The screen should display n = 5. OR n and the display will read 5 (you can skip this step)
and the display will read 3. This is the mean x
and the display will read 13.87443693. This is the sample standard deviation s and the display will read 192.5. This is the variance s2
The mean is 3, the standard deviation is 13.87 and the variance is 192.5. The button accesses a number of extra statistical functions. = Σx2 = Σy2
= Σx
= Σy
= Σxy
In the example below, the progressive calculations are shown simply to give you some understanding of the underlying processes � you should do one or two examples in detail and then check them by calculator.
