20090601
Definition of Term
s
C-Level : confidence level (0
C-Level < 1)
σ
1
:
population standard deviation of sample 1 (
σ
1
> 0)
σ
2
:
population standard deviation of sample 2 (
σ
2
> 0)
List(1) :
list where sample 1 data is located
List(2) :
list where sample 2 data is located
Freq(1) : frequency of sample 1 (1 or list name)
Freq(2) : frequency of sample 2 (1 or list name)
M
1
:
sample mean of sample 1 data
n
1
:
size of sample 1 (positive integer)
M
2
:
sample mean of sample 2 data
n
2
:
size of sample 2 (positive integer)
Calculation Re
s
ult Output
Lower : interval lower limit (left edge)
Upper : interval upper limit (right edge)
M
1
:
sample mean of sample 1 data
M
2
:
sample mean of sample 2 data
s
x
1
:
sample standard deviation of sample 1 (Displayed only for list format.)
s
x
2
:
sample standard deviation of sample 2 (Displayed only for list format.)
n
1
:
size of sample 1
n
2
:
size of sample 2
Example
list1 : { 154, 109, 137, 115, 140 } , population
standard deviation : 15.5
list2 : { 108, 115, 126, 92, 146 } , population standard
deviation : 13.5
Significance level : 5% ( = confidence level : 95%)
• Stati
s
tic
s
Wizard Operation
(1) Input the data into [list1] and [list2] in the Stat Editor.
(2) On the menu bar, tap [Calc] and then [Interval].
(3) Select [Two-Sample ZInt] and [List], and then tap
[Next
>>].
(4) Input values.
(5) Select List(1) [list1], List(2) [list2], Freq(1) [1] and
Freq(2)
[1].
(6) Tap [Next >>].
S
Program, eActivity or Main Application
Command:
TwoSampleZInt
:
Command Syntax
Syntax 1 (li
s
t format)
C-Level
value,
σ
1
value,
σ
2
value, List(1), List(2), Freq(1) (or 1), Freq(2) (or 1)
* “Freq” can be omitted. Doing so sets “1” for “Freq”.
Syntax 2 (parameter format)
C-Level
value,
σ
1
value,
σ
2
value,
M
1
value,
n
1
value,
M
2
value,
n
2
value
7-10-4
Confidence Intervals
Summary of Contents for ClassPad 330
Page 11: ...20060301 20090601 ClassPad 330 ClassPad OS Version 3 04 ...
Page 277: ...20060301 3 3 10 Storing Functions 3 Tap AND Plot OR Plot ...
Page 779: ...20090601 S Graph Line Clustered C S Graph Line Stacked E 13 9 2 Graphing ...
Page 780: ...20090601 S Graph Line 100 Stacked F S Graph Column Clustered G 13 9 3 Graphing ...
Page 781: ...20090601 S Graph Column Stacked I S Graph Column 100 Stacked J 13 9 4 Graphing ...
Page 782: ...20090601 S Graph Bar Clustered K S Graph Bar Stacked 9 13 9 5 Graphing ...
