Casio CFX-9970G User Manual page 314

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Confidence Interval
k k k k k Z Confidence Interval
You can use the following menu to select from the different types of
interval.
• {1-S}/{2-S}/{1-P}/{2-P} ... {1-Sample}/{2-Sample}/{1-Prop}/{2-Prop}
u u u u u 1-Sample Z Interval
1-Sample
known.
The following is the confidence interval.
However, ) is not the confidence level itself.
When the confidence level is 95%, for example, inputting 0.95 produces 1 – 0.95 =
0.05 = ) .
Perform the following key operation from the statistical data list.
The following shows the meaning of each item in the case of list data specifica-
tion.
The following shows the meaning of parameter data specification items that are
different from list data specification.
Z
Interval calculates the confidence interval when standard deviation is
Z
Interval is applied to normal distribution.
Left = o – Z ) %
2
n
Right = o + Z ) %
2
n
4(INTR)
1(Z)
1(1-S)
Data ................ data type
C-Level ........... confidence level (0 < C-Level < 1)
% ..................... population standard deviation ( % > 0)
List .................. list whose contents you want to use as sample data
Freq ................ sample frequency
Execute .......... executes a calculation
o
..................... sample mean
n
..................... sample size (positive integer)
Z
confidence
Z
Interval
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