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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:
N
4
(SD)
Select FreqOn for the statistical frequency setting:
1N
(SETUP)
dd
1
(FreqOn)
Input the sample data:
55
m
(DT)
57
1
,
(;)
2
m
(DT)
59
1
,
(;)
2
m
(DT)
61
1
,
(;)
5
m
(DT)
63
1
,
(;)
8
m
(DT)
65
1
,
(;)
9
m
(DT)
67
1
,
(;)
8
m
(DT)
69
1
,
(;)
6
m
(DT)
71
1
,
(;)
4
m
(DT)
73
1
,
(;)
3
m
(DT)
75
1
,
(;)
2
m
(DT)
Obtain the mean:
1
2
(S-VAR)
1
(
o
)
E
Obtain the sample standard deviation:
1
2
(S-VAR)
3
(
x
σ
n
–1
)
E
x
6568
x
6568
xσn–
1
4635444632
xσn–
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