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

Page 51

background image

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