Casio CFX-9850GC PLUS Manual Program - Halaman 6

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Halaman Cetak
Casio CFX-9850GC PLUS Manual Program
Program for
Description
The mean (sample mean) and sample standard deviation can be used to obtain a
value.
(x – m)
t =
x
Example
To determine whether the population standard deviation for sample data 55, 54, 51,
55, 53, 53, 54, 52, is 53.
Perform a
Preparation and operation
• Store the program written on the next page.
• Execute the program as shown below.
Step Key operation
The above operation produces a t-test value of t(53) = 0.7533708035. According to the t-distribution
table in the next page, a level of significance of 5% and a degree of freedom of 7 (
produce a two-sided t-test value of approximately 2.365. Since the calculated t-test value is lower
than the table value, the hypothesis that population mean
416
PROGRAM SHEET
t
-Test Value
x
: mean of
σ
x
: sample standard deviation of
n
–1
n–
1
n
: number of data items
n
m
: hypothetical population standard deviation (normally
represented by µ , but
name limitations)
t
-test with a level of significance of 5%.
Display
x
data
x
m
is used here because of variable
Step Key operation
m
equals 53 is accepted.
No.
3
t
-test
data
Display
n
– 1 = 8 – 1 = 7)