20090601
Example
Data1 : 49, sample size : 61
Data2 : 38, sample size : 62
Significance level : 5% ( = confidence level : 95%)
• Stati
s
tic
s
Wizard Operation
(1) On the menu bar, tap [Calc] and then [Interval].
(2) Select [Two-Prop ZInt] and then tap [Next >>].
(3) Input values.
(4) Tap [Next >>].
S
Program, eActivity or Main Application
Command:
TwoPropZInt
:
Command Syntax
C-Level
value,
x
1
value,
n
1
value,
x
2
value,
n
2
value
Input Example:
TwoPropZInt 0.95,49,61,38,62
I
t
Confidence Interval
1-Sample
t
Interval
Menu:
[Interval]-[One-Sample
TInt]
De
s
cription:
This command obtains the confidence interval for the population mean when
the population standard deviation is unknown.
The confidence interval is obtained using the following expressions.
The confidence level is 100 (1 –
A
)%.
Definition of Term
s
C-Level : confidence level (0
C-Level < 1)
List :
list where sample data is located
Freq :
frequency of sample (1 or list name)
M
:
sample mean
s
x
:
sample standard deviation (s
x
0)
n
:
sample size (positive integer)
Lower
=
o
–
t
n
–
1
2
n
s
x
2
n
s
x
Upper
=
o
+
t
n
–
1
Lower
=
o
–
t
n
–
1
2
n
s
x
2
n
s
x
Upper
=
o
+
t
n
–
1
7-10-7
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 ...