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Statistical Functions* (Continued)
Function
Description
Typing Aid
Sy
Sum of the y-values.
{Z} {»}
Sy?
Sum of the squares of the y-
{2} {»2}
values.
X
Arithmetic mean (average) of
{z.5} {=}
the x-values.
X(y)
Estimates the x-value for the
{LR. } {%}
given value of y, using the line
calculated by linear
regression.
Xw
Weighted mean of the x-val-
{z.5} {=w}
ues weighted according to the
y-values.
y
Arithmetic mean (average) of
{z.7} {¥}
the y-values.
J(x)
Estimates the y-value for the
{LR} {5}
given value of x, using the line
calculated by linear
regression.
* The statistical functions use the data stored in the statistical registers.
Unit-Conversion Functions
Function
Conversion
Typing Aid
°C(x)
Degrees Fahrenheit to de-
BluniTS] {TMP} {*°C}
grees Celsius.
CM(x)
Inches to centimeters.
BluniTs] {L} {*CH}
°F(x)
Degrees Celsius to degres
BluniTs) {THFP} {+"F}
Fahrenheit.
GAL(x)
Liters to U.S. gallons.
BluniTs] {WOL} {+GAL}
IN(x)
Centimeters to inches.
B(uniTs] {L} {*IN}
KG(x)
Pounds to kilograms.
B(uniTs] {M} {+KG}
LTR(x)
U.S. gallons to liters.
BluniTs) {vOL} {+LTR}
LB(x)
Kilograms to pounds.
B(uniTs] {M} {+LBE}
6: Evaluating and Solving Equations
83
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