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Statistics Programs 16–9
Example 1:
Fit a straight line to the data below. Make an intentional error when keying in the
third data pair and correct it with the undo routine. Also, estimate
y for an x value
of 37. Estimate
x for a y value of 101.
X 40.5 38.6 37.9 36.2 35.1 34.6
Y 104.5 102 100 97.5 95.5 94
Keys:
(In RPN mode)
Display: Description:
X
S
%@
)
Starts straight–line routine.
40.5
g
&@
value
Enters x–value of data pair.
104.5
g
%@
)
Enters y–value of data pair.
38.6
g
&@
)
Enters x–value of data pair.
102
g
%@
)
Enters y–value of data pair.
Now intentionally enter 379 instead of 37.9 so that you can see how to correct
incorrect entries.
Keys:
(In RPN mode)
Display: Description:
379
g
&@
)
Enters wrong x–value of data
pair.
g
%@
)
Retrieves
%@
prompt.
X
U
%@
)
Deletes the last pair. Now
proceed with the correct data
entry.
37.9
g
&@
)
Enters correct x–value of data
pair.