Function Key Index 205

ÖComputes mean (average) of x-values and y-values using accumulated statistics (page 77).

Computes weighted average of y-(item) and x-(weight) values using accumulated statistics (page 81).

vComputes sample standard deviations of x- and y-values using accumulated statistics (page 79).

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 80).

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 80).

Mathematics

rComputes square root of number in displayed X-register (page 83).

qRaises number in Y-register to power of number in X-register (page 85).

yComputes reciprocal of number in displayed X-register (page 83).

eComputes factorial [n•(n–1)... 3•2•1] of number in displayed X-register (page 83).

>Natural antilogarithm. Raises e (approximately 2.718281828) to power of number in displayed X-register (page 83).

¿Computes natural logarithm (base e) of number in displayed X-register (page 83).

Number Alteration

BRounds mantissa of 10digit number in X-register to match the display (page 83).

ÑLeaves only the integer portion of number in displayed X-register by truncating fractional portion (page 83).

TLeaves only the fractional portion of number in displayed X-register by truncating integer portion (page 84).

Stack Rearrangement

~Exchanges contents of X and Y-registers of stack (pages 74 and 172).

dRolIs down contents of stack for viewing in displayed X-register (page 172).

FRecalls number displayed before the previous operation back into the displayed X-register (pages 74 and 176).

File name: hp 12c_user's guide_English_HDPMBF12E44

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Printered Date: 2005/7/29

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