Texas Instruments TI-83 Test and Interval Output Variables

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

p-value pp

TEST

test statistics z, t, c2, Üt, ÜTEST

degrees of freedom df df df TEST

sample mean of x values for

sample 1 and sample 2

v1, v2v1, v2TEST

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

Ç1Ç1TEST

estimated sample proportion for

population 2

Ç2Ç2TEST

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 sTEST

regression/fit coefficients a, bEQ

correlation coefficient rEQ

coefficient of determination r2EQ

regression equation RegEQ EQ

Test and Interval Output Variables