38
Left .............................. interval lower limit (left edge)
Right ............................ 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
k
k
k
k
t
Interval
u
u
u
u
u
1-Sample
t
Interval
1-Sample
t
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-
!
) % is the confidence level.
Left
=
o
–
t
n
–
1
!
2
Right
=
o
+
t
n
–
1
!
2
x
n
–
1
"
n
x
n
–
1
"
n
Perform the following key operation 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
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.
