7-10-10

Confidence Intervals

Example

list1 : { 12.207, 16.869, 25.05, 22,429, 8.456, 10.589 }

list2 : { 11.074, 9.686, 12.064, 9.351, 8.182, 6.642 }

Significance level : 5% ( = confidence level : 95%)

•Statistics 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 TInt] and then tap [Next >>].

(4)Input value.

(5)Select List(1) [list1], List(2) [list2], Freq(1) [1], Freq(2) [1] and Pooled [Off].

(6)Tap [Next >>].

uProgram, eActivity or Main Application

Command: TwoSampleTInt

Command Syntax

Syntax 1 (list format)

C-Level value, List(1), List(2), Freq(1) (or 1), Freq(2) (or 1), Pooled condition (On or Off)

*“Freq” can be omitted. Doing so sets “1” for “Freq”.

*“Pooled” can be omitted. Doing so sets “Off” for “Pooled”.

Syntax 2 (parameter format)

C-Level value, o1 value, x1σn−1 value, n1 value, o2 value, x2σn−1 value, n2 value, Pooled condition (On or Off)

* “Pooled” can be omitted. Doing so sets “Off” for “Pooled”.

Input Example:

Syntax 1 (list format)

TwoSampleTInt 0.95,list1,list2,1,1,Off

Syntax 2 (parameter format)

TwoSampleTInt 0.95,80.4,2.07,30,84.2,1.96,35,On

20060301