Study Notes - Ch 7 - Hypothesis Tests and Confidence Intervals in Multiple regression

[Dr. Jayanthi Sankaran]

Hi David,

In the following three variable regression,

where STR = student/Teacher ratio and PctEL = % of English learners in a district

Test Score = 686 - 1.10 x STR - 0.65 x PctEL
(7.41) (0.38) (0.04)

STR: t statistic = (-1.10 - 0)/0.38 = -2.90
p value 2 Tail = 0.4%
How do you get the p value 2 Tail = 0.4% without degrees of freedom? I notice that I always have a problem with p-value?

Thanks!
Jayanthi

 

[Dr. Jayanthi Sankaran]

Hi David,

Got the solution:
The t-statistic is t = (-1.10 - 0)/0.38 = - 2.90
The associated p value 2 Tail is 2phi(-2.90) = .004 = 0.4%

Thanks!
Jayanthi