Chapter 13: Inferential Statistics and Distributions 363
LinRegTTest
LinRegTTestLinRegTTest
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+bx. It tests the null hypothesis H0:b=0 (equivalently, r=0) against one of the
alternatives below.
•H
a: bƒ0 and rƒ0 (b & r:ă0)
•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 St atist ics 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