Texas Instruments TI-86 - Page 205

Chapter 14: Statistics
193
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 193 of 1414STATS.DOC TI-86, Chap 14, US English Bob Fedorisko Revised: 02/13/01 2:33 PM Printed: 02/13/01 3:04 PM Page 193 of 14
Result
Variables
1-Var
Stats
2-Var
Stats Other
Result
Variables
1-Var
Stats
2-Var
Stats Other
mean of x values
vv
correlation coeff
corr
pop std dev of x
s
x
s
x
y-intercept of reg eq
a
sample std dev of x
Sx Sx
slope of reg eq
b
mean of y values
w
regression
à
fit coeff
a
,
b
pop std dev of y
s
y
number of data pts
nn
sample std dev of y
Sy
min of x values
minX minX
sum of x values
G
x
G
x
max of x values
maxX maxX
sum of x
2
values
G
x
2
G
x
2
min of y values
minY
sum of y values
G
y
max of y values
maxY
sum of y
2
values
G
y
2
median
Med
sum of x ¹ y
G
xy
1st quartile
Qrtl1
regression equation
RegEq
3rd quartile
Qrtl3
polynomial,
LgstR
,
and
SinR
coeff’s
a
(y-int)
b
(slope)
polynomial
LgstR
,
and
SinR
reg coeff’s
PRegC
The first quartile (
Qrtl1
) is the median of the points between
minX
and
Med
(median). The
third quartile (
Qrtl3
) is the median of the points between
Med
and
maxX
.
When you calculate a logistic regression,
1
is stored to
tolMet
(
tolMe
) if the TI
-
86 internal
tolerance was met before the calculator arrived at a result; if not met,
0
is stored to
tolMet
.
These words are abbreviated
in the table:
pop = population
std dev = standard deviation
coeff = coefficient
int = intercept
reg eq = regression equation
pts = points
min = minimum
max = maximum