Texas Instruments TI-84 Plus Guide Book

Chapter 13: Inferential Statistics and Distributions 370
Test and Interval Output Variables
Test and Interval Output VariablesTest and Interval Output Variables
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.
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
Input Description

Texas Instruments TI-84 Plus Specifications

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Battery type	AAA
Power source	Battery
Number of batteries supported	4
Type	Graphing
Cover	No
Form factor	Pocket
Control type	Buttons
Product color	Black
USB port	Yes
USB 2.0 ports quantity	1
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Display number of characters	16
RAM capacity	0.024 MB
ROM capacity	0.480 MB
Storage media type	-