Texas Instruments TI-82 STATS

13–28 Inferential Statistics and Distributions
8250FC~1.DOC TI-83 international English Bob Fedorisko Revised: 10/26/05 1:39 PM Printed: 10/27/05 2:57
PM Page 28 of 36
The inferential statistics variables are calculated as indicated below. To access these
variables for use in expressions, press ,
5 (5:Statistics), and then select the
VARS menu listed in the last column below.
Variables Tests Intervals
LinRegTTest,
ANOVA
V
ARS
Menu
p-value ppTEST
test statistics z, t, c
2
, Ü
ÜÜ
Ü t, Ü
ÜÜ
Ü TEST
degrees of freedom df df df TEST
sam
p
le mean of x values for sam
p
le
1 and sample 2
v1, v2 v1, v2 TEST
sam
p
le standard deviation of x for
sample 1 and sample 2
Sx1,
Sx2
Sx1,
Sx2
TEST
number of data
p
oints for sam
p
le 1
and sample 2
n1, n2 n1, n2 TEST
pooled standard deviation SxP SxP SxP TEST
estimated sample proportion Ç
ÇÇ
ÇÇ
ÇÇ
Ç TEST
estimated sam
p
le
p
ro
p
ortion for
p
opulation 1
Ç
ÇÇ
Ç1 Ç
ÇÇ
Ç1 TEST
estimated sam
p
le
p
ro
p
ortion for
p
opulation 2
Ç
ÇÇ
Ç2 Ç
ÇÇ
Ç2 TEST
confidence interval pair lower,
upper
TEST
mean of x values vv XY
sample standard deviation of x Sx Sx XY
number of data points nn XY
standard error about the line s TEST
regression/fit coefficients a, b EQ
correlation coefficient r EQ
coefficient of determination r
2
EQ
regression equation RegEQ EQ
Test and Interval Output Variables