Texas Instruments -84 Plus, Manual Book

Page: 366 / 696

Chapter 13: Inferential Statistics and Distributions 363
LinRegTTest LinRegTTest LinRegTTest LinRegTTest
LinRegTTest
(linear regression
t
test; item
F)
computes a linear regression on the given
data and a
t
test on the value of slope
b
and the correlation coefficient
r
for the equation
y
=
a
+
b
x. It tests the null hypothesis H
0
:
b
=0 (equivalently,
r
=0) against one of the
alternatives below.
• H
a
:
bƒ
0 and
rƒ
0 (
b
&
r
:
ă
0
)
• H
a
:
b
<0 and
r
<0 (
b
&
r
:<0
)
• H
a
:
b
>0 and
r
>0 (
b
&
r
:>0
)
The regression equation is automatically stored to
RegEQ
(
VARS Statistics EQ
secondary
menu). If you enter a Y= variable name at the
RegEQ:
prompt, the calculated regression
equation is automatically stored to the specified Y= equation. In the example below, the
regression equation is stored to
Y1
, which is then selected (turned on).
In the example:
Drawn results:
L3={
L4={ 38
41 56
63 59
70 64
72 74}
84}
Data Stats