# Resolved: Answer of the third question

I don't understand how we got the answer for question 3 in the regression quiz.

Can you please explain how?

1 answers ( 1 marked as helpful)

Hey Hassan,

Thank you for reaching out!

Let's examine the coefficients table from the OLS regression results:

Using the value of the coefficients in front of **const** and **SAT**, let's write down the corresponding formula for linear regression, namely:

GPA = 0.2750 + 0.0017*SAT

We can see that the variable **const** has a p-value of 0.503 which makes it statistically insignificant. The question asks to make a prediction excluding such insignificant variables and that reduces the equation above down to

GPA = 0.0017*SAT

Now, plugging in SAT = 1850, we obtain the desired result.

Hope this helps!

Kind regards,

365 Hristina