User Manual

Section 2: Working with f 55
Keystrokes
Display
1.234´A
8.914 -01
P(1.234).
.5´E
5.205 -01
erf(0.5).
Example: For a Normally distributed random variable X with mean 2.151 and standard
deviation 1.085, calculate the probability Pr [2 < X  3].
























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


085.1
151.22
085.1
151.23
085.1
151.23
085.1
151.22
]32[
PP
X
PrXPr


Keystrokes
Display
2 v
2.000 -00
2.151-
-1.510 -01
1.085÷
-1.392 -01
´A
4.447 -01
Calculates Pr[X≤2].
O3
4.447 -01
Stores value.
3 v
3.000 00
2.151-
8.490 -01
1.085÷
7.825 -01
´A
7.830 -01
Calculates Pr[X≤3].
l3
4.447 -01
Recalls Pr[X≤2].
-
3.384 -01
Calculates Pr[2<X≤3].
´•4
0.3384