Casio Algebra FX 2.0 PLUS User Manual page 42

Left .............................. interval lower limit (left edge)
Right ............................ interval upper limit (right edge)
ˆ p
................................. estimated sample propotion for sample 1
1
ˆ p
................................. estimated sample propotion for sample 2
2
n
................................. size of sample 1
1
n
................................. size of sample 2
2
k k k k k t Interval
u u u u u 1-Sample t Interval
t
1-Sample Interval calculates the confidence interval for an unknown population mean
when the population standard deviation is unknown.
The following is the confidence interval. The value 100 (1 –
Left = o– t
Right = o+ t
Perform the following key operations from the statistical data list.
4(INTR)
c(T)
b(1-Smpl)
The following shows the meaning of each item in the case of list data specification.
Data ............................ data type
C-Level ........................ confidence level (0 < C-Level < 1)
List .............................. list whose contents you want to use as sample data
Freq ............................. sample frequency (1 or List 1 to 20)
Save Res ..................... list for storage of calculation results (None or List 1 to 20)
Execute ....................... executes a calculation
The following shows the meaning of parameter data specification items that are different
from list data specification.
1-3-8
Confidence Interval (INTR)
σ
α x
n–1
n – 1 2
n
σ
x
α
n–1
n – 1
2 n
(List 1 to 20)
20011101 20010101
α
) % is the confidence level.