Operation Manual

Chapter 13: Inferential Statistics and Distributions 245
Test and Interval Output Variables
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.
n1
The count of observations in sample one for the 2-PropZTest
and 2-PropZInt. Must be an integer > 0.
n2
The count of observations in sample two for the 2-PropZTest
and
2-PropZInt. Must be an integer > 0.
C-Level
The confidence level for the interval instructions. Must be ‚ 0
and < 100. If it is ‚ 1, it is assumed to be given as a percent and
is divided by 100. Default=0.95.
Observed (Matrix)
The matrix name that represents the columns and rows for
the observed values of a two-way table of counts for the
c
2
-Test and c
2
GOF-Test. Observed must contain all integers
| 0. Matrix dimensions must be at least 2×2.
Expected (Matrix)
The matrix name that specifies where the expected values
should be stored.
Expected is created upon successful
completion of the c
2
-Test and c
2
GOF-Test.
df
df (degree of freedom) represents (number of sample
categories) - (number of estimated parameters for the
selected distribution + 1).
Xlist, Ylist The names of the lists containing the data for LinRegTTest
and LinRegTInt. Defaults are L1 and L2, respectively. The
dimensions of Xlist and Ylist must be the same.
RegEQ
The prompt for the name of the Y= variable where the
calculated regression equation is to be stored. If a Y= variable
is specified, that equation is automatically selected (turned
on). The default is to store the regression equation to the
RegEQ variable only.
Variables Tests Intervals
LinRegTTest,
ANOVA
VARS
Menu
p-value
ppTEST
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
v1, v2 v1, v2
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 ‚Ç ‚Ç
TEST
estimated sample proportion for
population 1
‚Ç1 ‚Ç1
TEST
Input Description