Casio CFX-9970G, Руководство пользователя

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295
Example To calculate the 1-Sample
Z
Interval for one list of data
For this example, we will obtain the
Z
Interval for the data
{11.2, 10.9, 12.5, 11.3, 11.7}, when C-Level = 0.95 (95% confi-
dence level) and
%
= 3.
1 (List)
c
a.jf w
d w
1
(List1)
c 1
(1)
c 1
(CALC)
Left ................. interval lower limit (left edge)
Right ............... interval upper limit (right edge)
o
..................... sample mean
x
%
n -1
................ sample standard deviation
n
..................... sample size
u u u u u
2-Sample Z Interval
2-Sample Z Interval calculates the confidence interval when the standard
deviations of two samples are known.
Left =
( o
1
– o
2
)
– Z
)
2
Right =
( o
1
– o
2
)
+ Z
)
2
n
1
1
2
%
+
n
2
2
2
%
n
1
1
2
%
+
n
2
2
2
%
o
1
: sample 1 mean
o
2
: sample 2 mean
%
1
: population standard deviation
of sample 1
%
2
: population standard deviation
of sample 2
n
1
: sample 1 size
n
2
: sample 2 size
Perform the following key operation from the statistical data list.
4 (INTR)
1 (Z)
2 (2-S)
The following shows the meaning of each item in the case of list data specifica-
tion.
Data ................ data type
C-Level ........... confidence level (0
<
C-Level < 1)
Confidence Interval
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