Number

1

2

3

4

5

6

Frequency Observed

25

17

15

23

24

16

Keystroke:

Display:

Description:

 

 

 

Displays SUM menu and

 

 

 

 

 

 

current list.

 

Clears current list or gets a

@c

or

new one.



25 I

Enters observed values.

17 I

 

15 I

 

23 I

 

24 I

 

16 I 

 

 

 

 

 

 

 

 

 



 

 

 

 

 

 

 

Names the list OBS.

e

OBS I 

 

e

Displays the CHI

(use [and ]

 

equation. Make sure

if necessary )

 

name1 is OBS.

 

 

 

 

 

 

Displays menu.

 

 

 

 

 

 

 

 

 

20

 



Stores expected value.

 

 



Calculates χ2.

 



 

 

 

The number of degrees of freedom is (n–1)＝5. Consult statistical tables to find χ2 to a significance level of 0.05 with 5 degrees of freedom. The

table shows that χ 2. , ＝11.07. Since the computed value (5.00) is less

0 05 5

than 11.07, you can conclude that, to a 0.05 significance level (95% probability), the die is fair.

14: Additional Examples 221

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