Casio CFX-9850GB PLUS, User Manual

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20070201
Left ............................... confi dence interval lower limit (left edge)
Right ............................. confi dence interval upper limit (right edge)
ˆ p
1
................................. estimated sample propotion for sample 1
ˆ p
2
................................. estimated sample propotion for sample 2
n
1
................................. size of sample 1
n
2
................................. size of sample 2
k t
Interval
u
1-Sample
t
Interval
1-Sample
t
Interval calculates the confi dence interval for an unknown population mean
when the population standard deviation is unknown.
The following is the confi dence interval.
α
is the level of signifi cance. The value 100 (1 –
α
)
% is the confi dence level.
Perform the following key operations from the statistical data list.
4
(INTR)
2
(t)
1
(1-S)
The following shows the meaning of each item in the case of list data specifi cation.
Data ............................. data type
C-Level ........................ confi dence level (0
<
C-Level < 1)
List ............................... list whose contents you want to use as sample data
(List 1 to 26)
Freq ............................. sample frequency (1 or List 1 to 26)
Save Res ..................... list for storage of calculation results (None or List 1 to 26)
Execute ....................... executes a calculation
The following shows the meaning of parameter data specifi cation items that are different
from list data specifi cation.
Left =
o
– t
n
– 1
α
2
Right =
o
+ t
n – 1
α
2
x
n
–1
σ
n
x
n –1
σ
n
Left =
o
– t
n
– 1
α
2
Right =
o
+ t
n – 1
α
2
x
n
–1
σ
n
x
n –1
σ
n
6-6-8
Confi dence Interval