HP 17bII - Page 221

14: Additional Examples 221
File name : English-M02-1-040308(Print).doc Print data : 2004/3/9
Number 123456
Frequency Observed 25 17 15 23 24 16
Keystroke: Display: Description:
   Displays SUM menu and
current list.
@c

or
 



Clears current list or
g
ets a
new one.
25
I
17
I
15
I
23
I
24
I
16
I







Enters observed values.
e

OBS
I


Names the list OBS.
e

(
use
[
and
]
if necessary )
 Displays the CHI
equation. Make sure
name1 is OBS.
  Displays menu.
20   Stores expected value.




Calculates
χ
2
.
The number of degrees of freedom is (
n–1)＝5. Consult statistical tables
to find
χ
2
to a significance level of 0.05 with 5 degrees of freedom. The
table shows that
2
0055
χ
.,
＝11.07. Since the computed value (5.00) is less
than 11.07, you can conclude that, to a 0.05 significance level (95%
probability), the die is fair.