15

20

 

2.95

 

 

 

 

 

 

 

0

 

 

23

20

 

3.40

 

 

 

 

 

 

 

0

 

 

24

20

 

4.20

 

 

 

 

 

 

0

 

 

16

20

 

5.00

X2

 

 

 

 

 

0

 

 

The number of degrees of freedom is (n-1). Since n = 6, the degrees of freedom = 5.

Consulting statistical tables, you look up x2 to a 0.05 significance level

with 5 degrees of freedom, and see that x20.05,5 = 11.07. Since x2 = 5 is within 11.07, we may conclude that to a 0.05 significance level (probability = .95), the die is fair.

Try the following HP-12C program with the same example.

KEYSTROKES

 

 

DISPLAY

 

 

 

 

 

CLEAR

 

00-

 

 

0

 

01-

44

0

 

 

02-

 

30

 

 

 

 

 

 

 

03-

 

36

 

 

 

 

 

 

 

04-

 

20

 

 

 

 

 

0

 

05-

45

0

 

 

06-

 

10

 

 

 

 

 

 

 

07-

 

40

 

 

 

 

00

 

08-43, 33

00

 

 

 

 

 

 

REGISTERS

 

 

n: Unused

 

i: Unused

 

PV: Unused

 

PMT: Unused

 

FV: Unused

 

R0: Ei

 

 

R1-R.9: Unused

 

 

 

 

112

Page 113
Image 113
HP 12C manual 112