34
After setting all the parameters, align the cursor with [Execute] and then press the function
key shown below to perform the calculation.
•
1
(CALC) ... Performs the calculation.
Calculation Result Output Example
Left .............................. interval lower limit (left edge)
Right ............................ interval upper limit (right edge)
o
.................................. mean of sample
x
"
n
-1
............................. sample standard deviation
(Displayed only for Data: List Setting)
n
.................................. size of sample
u
u
u
u
u
2-Sample
Z
Interval
2-Sample
Z
Interval
calculates the confidence interval for the difference between two
population means when the standard deviations of two samples are known.
The following is confidence interval. The value 100 (1-
!
) % is the confidence level.
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
: mean of sample 1
o
2
: mean of sample 2
"
1
: population standard deviation
of sample 1
"
2
: population standard deviation
of sample 2
n
1
: size of sample 1
n
2
: size of sample 2
Perform the following key operation from the statistical data list.
4
(INTR)
b
(Z)
c
(2-Smpl)
Содержание STAT 2
Страница 30: ...30 u u u u uInput Example u u u u uResults...
Страница 56: ...56 Calculation Result Output Example p F distribution probability...
Страница 64: ...Examples...
