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Statistics Programs 16-9
13. For a new case, go to step 2.
Variables Used:
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.
B Regression coefficient (y–intercept of a straight line); also
used for scratch.
M Regression coefficient (slope of a straight line).
R Correlation coefficient; also used for scratch.
X The x–value of a data pair when entering data; the
hypothetical x when projecting ; or (x–estimate)
when given a hypothetical y.
Y The y–value of a data pair when entering data; the
hypothetical y when projecting ; or (y–estimate)
when given a hypothetical x.
Statistics registers Statistical accumulation and computation.
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:
S
Starts straight–line routine.
value
Enters x–value of data pair.
y
ˆ
x
ˆ
x
ˆ
y
ˆ