Casio fx-50F PLUS - 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