112
The number of degrees of freedom is (n-1). Since n = 6, the degrees of
freedom = 5.
Consulting statistical tables, you look up x
2
to a 0.05 significance level
with 5 degrees of freedom, and see that x
2
0.05,5
= 11.07. Since x
2
= 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.
15 20
0
2.95
23 20
0
3.40
24 20
4.20
0
16 20
0
5.00
X
2
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
R
0
: E
i
R
1
-R
.9
: Unused
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