Texas TI-86 用户手册

192

Chapter 14: Statistics

14STATS.DOC TI-86, Chap 14, US English Bob Fedorisko Revised: 02/13/01 2:33 PM Printed: 02/13/01 3:04 PM Page 192 of 14

The result for a polynomial regression, sinusoidal regression, or logistic regression is stored in

PRegC

(polynomial

àregression coefficients).

PRegC

is a list containing the coefficients for an

equation. For example, for

P3Reg

, the result

PRegC={3 5

2 7}

would represent

y=3x

+5x

N2x+7.

Results of a Statistical Analysis

When you perform a statistical analysis, the calculated results are stored in the result
variables and the data from the lists used in the analysis are stored to

xStat

yStat

, and

fStat

If you edit a list or change the type of analysis, all statistical variables are cleared.

The STAT VARS (Statistical Variables) Menu

- š *

CALC

EDIT

PLOT

DRAW

VARS

RegEq

corr

minX

maxX

minY

maxY

Med

PRegC

Qrtl1

Qrtl3

tolMe

To paste a result variable to the cursor location, either select the variable from the

STAT

VARS

menu or select the variable from the

VARS STAT

selection screen.

♦

To use a result variable in an expression, paste it to the appropriate cursor location.

♦

To display the value of a result variable, paste it to the home screen and press b.

♦

To store results to another variable after a calculation, paste the result variable to the
home screen, press X, enter a new variable, and then press b.

PRegC

is the only statistical

result variable calculated for
a polynomial regression.

One- and two-variable
statistical functions share the
result variables.

The statistical variables are
calculated and stored as
shown in the table on the
next page.

You can use ALPHA keys,
alpha keys, and the

CHAR

GREEK

menu to enter some

result variables.