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13-28 Inferential Statistics and Distributions
8313INFE.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:47 PM Printed: 02/19/01 1:38 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
VARS
Menu
p-value pp
TEST
test statistics z, t,
c
2
,
Ü
t
,
Ü
TEST
degrees of freedom df df df
TEST
sample mean of x values for
sample 1 and sample 2
v
1
,
v
2
v
1
,
v
2
TEST
sample standard deviation of x
for sample 1 and sample 2
Sx1,
Sx2
Sx1,
Sx2
TEST
number of data points for sample
1 and sample 2
n1, n2 n1, n2
TEST
pooled standard deviation SxP SxP SxP
TEST
estimated sample proportion
ÇÇ
TEST
estimated sample proportion for
population 1
Ç
1
Ç
1
TEST
estimated sample proportion for
population 2
Ç
2
Ç
2
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