Texas Instruments -84 Plus, Руководство пользователя

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Chapter 12: Statistics 282
Setting Up Statistical Analyses Setting Up Statistical Analyses Setting Up Statistical Analyses Setting Up Statistical Analyses
Using Lists to Store Data Using Lists to Store Data Using Lists to Store Data Using Lists to Store Data
Data for statistical analyses is stored in lists, which you can create and edit using the stat
list editor. The TI-84 Plus has six list variables in memory,
L1
through
L6
, to which you
31. Press
£
20
¤
to enter a string length of 20 cm.
Press
Í
to calculate the predicted time of
about 0.92 seconds.
Based on the residual analysis, we would expect
the prediction of about 0.92 seconds to be within
about 0.02 seconds of the actual value.
32. Press
y [
to recall the Last Entry.
Press
| | |
5
to change the string length to 50
cm.
33. Press
Í
to calculate the predicted time of
about 1.48 seconds.
Since a string length of 50 cm exceeds the lengths
in the data set, and since residuals appear to be
increasing as string length increases, we would
expect more error with this estimate.
Note:
You also can make predictions using the
table with the
TABLE SETUP
settings
Indpnt:Ask
and
Depend:Auto
(Chapter 7).