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14: Additional Examples 219
File name : 17BII-Plus-Manual-E-PRINT-030709 Print data : 2003/7/11
4040
I
3200
I
"
;:H0L-T8U"
:E:198$%K.-(&(("
e
o
VOL
I
"
;:H0L-T8U"
Names the list VOL.
e
&
(use
]
and
[
if necessary)
" Displays the MAVG
equation. Make sure
name is VOL.
E
" Displays menu.
3
T
<8%&((" Stores number of
points.
3
e
"
01O="
"
01O=8+K$$(&(("
Calculates average for
months 1, 2, and 3.
4
e
"
01O="
"
01O=8%K,-'&'-"
Calculates average for
months 2, 3, and 4.
5
e
"
01O="
"
01O=8%K.%'&'-"
Calculates average for
months 3, 4, and 5.
6
e
"
01O="
"
01O=8%K'%'&'-"
Calculates average for
months 4, 5, and 6.
Chi-Squared (
χ
2
) Statistics
The χ
2
statistic is a measure of the goodness of fit between data and an
assumed distribution.
*
It is used to test whether a set of observed
frequencies differs from a set of expected frequencies sufficiently to
reject the hypothesis under which the expected frequencies were
obtained.
*
The statistic can be assumed to be χ
2
distributed with n－1 degrees of
freedom if n or some of the E
i
values are large.