Statistical calculation examples, Xσ n – Casio fx-50F PLUS User Manual
Page 51

E-50
Command
Calculation Formula
Estimated Value
m
m
=
y –
a
b
Estimated Value
n
n =
a +
x
b
k
Statistical Calculation Examples
This section provides some actual examples of statistical calculation examples as they are
performed on your calculator.
Example 1: The nearby table shows the pulse rates of 50
students who attend a high school for boys
that has a total enrollment of 1,000 students.
Determine the mean and standard deviation of the
sample data.
Operation Procedure
Select the SD Mode:
N4(SD)
Select FreqOn for the statistical frequency setting:
1N(SETUP)dd1(FreqOn)
Input the sample data:
55m(DT)571,(;)2m(DT)591,(;)2m(DT)
611,(;)5m(DT)631,(;)8m(DT)
651,(;)9m(DT)671,(;)8m(DT)
691,(;)6m(DT)711,(;)4m(DT)
731,(;)3m(DT)751,(;)2m(DT)
Obtain the mean:
12(S-VAR) 1(
o
)
E
Obtain the sample standard deviation:
12(S-VAR) 3(
x
σ
n
–1
)
E
x
6568
x
6568
x
σn
–1
4635444632
x
σn
–1
4635444632
Pulse Rate
Students
54 – 56
1
56 – 58
2
58 – 60
2
60 – 62
5
62 – 64
8
64 – 66
9
66 – 68
8
68 – 70
6
70 – 72
4
72 – 74
3
74 – 76
2
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