Function Key Index 271

ÖComputes mean (average) of x-values and y-values using accumulated statistics (page 94).

Computes weighted average of y-(item) and x-(weight) values using accumulated statistics (page 99).

vComputes sample standard deviations of x- and y-values using accumulated statistics (page 96).

RLinear estimate

(X-register), correlation coefficient (Y-register). Fits a line to a set of (x,y) data pairs entered using _, then extrapolates this line to estimate a y-valuefor a given x-value. Also computes strength of linear relationship (r) among that set of (x, y) data pairs (page 97).

QLinear estimate

(X-register), correlation coefficient (Y-register). Fits a line to a set of (x, y) data pairs entered using _, then extra-polates this line to estimate an x-valuefor a given y-value. Also computes strength of linear relationship (r) among that set of (x,y) data pairs (page 97).

Modes

]sets calculator to RPN mode (page 19).

[sets calculator to algebraic (ALG) mode (page 19).

Mathematics

rComputes square root of number in displayed X-register (page 100).

qRaises number in Y-register to power of number in X-register (page 102).

yComputes reciprocal of number in displayed X-register (page 100).

eComputes factorial [n•(n–1)... 3•2•1] of number in displayed X-register (page 100).

>Natural antilogarithm. Raises e (approximately 2.718281828) to power of number in displayed X-register (page 100).

¿Computes natural logarithm (base e) of number in displayed X-register (page 100).

¡Computes square of the number displayed in the X-register

(page 100).
Number Alteration

BRounds mantissa of 10-digit number in X-register to match the display (page 100).

ÑLeaves only the integer portion of number in displayed X-register by truncating fractional portion (page 101).

TLeaves only the fractional portion of number in displayed X-register by truncating integer portion (page 101).

Stack Rearrangement

ØÙOpens and closes parenthesis in ALG mode.

(page 239)

~Exchanges contents of X and Y-registers of stack (pages 90 and 230).

dRolIs down contents of stack for viewing in displayed X-register (page 230).

FRecalls number displayed before the previous operation back into the displayed X-register (pages 91 and 234).

File name: hp 12c pt_user's guide_English_HDPMF123E27

Page: 271 of 275

Printed Date: 2005/8/1

Dimension: 14.8 cm x 21 cm