20090601
Example 2
(calculation with parameter)
Mean : 300
Sample size : 6
Population standard deviation : 3
Significance level : 5% ( = confidence level : 95%)
•
Stati
s
tic
s
Wizard Operation
(1) On the menu bar, tap [Calc] and then [Interval].
(2) Select [One-Sample ZInt] and [Variable], and then
tap [Next >>].
(3) Input values.
(4) Tap [Next >>].
S
Program, eActivity or Main Application
Command:
OneSampleZInt
:
Command Syntax
Syntax 1 (li
s
t format)
C-Level
value,
σ
value, List, Freq (or 1)
* “Freq” can be omitted. Doing so sets “1” for “Freq”.
Syntax 2 (parameter format)
C-Level
value,
σ
value,
M
value,
n
value
Input Example:
Syntax 1 (li
s
t format)
OneSampleZInt 0.95,3,list1,1
Syntax 2 (parameter format)
OneSampleZInt 0.95,3,300,6
2-Sample
Z
Interval
Menu:
[Interval]-[Two-Sample
ZInt]
De
s
cription:
This command obtains the confidence interval for the difference between
population means when the population standard deviations of two populations
are known.
The confidence interval is obtained using the following expressions.
The confidence level is 100 (1 –
A
)%.
Lower
=
(
o
1
–
o
2
)
–
Z
2
n
1
1
2
+
n
2
2
2
Upper
=
(
o
1
–
o
2
)
+
Z
2
n
1
1
2
+
n
2
2
2
M
1
: sample mean of sample 1 data
M
2
: sample mean of sample 2 data
σ
1
: population standard deviation of
sample 1
σ
2
: population standard deviation of
sample 2
n
1
: size of sample 1
n
2
: size of sample 2
7-10-3
Confidence Intervals
Summary of Contents for ClassPad 330
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