New Year Sale ! Hurry Up, Grab the Special Discount - Save 25% - Ends In 00:00:00 Coupon code: SAVE25

- Free Preparation Discussions

PRMIA Exam 8002 Topic 1 Question 82 Discussion

Actual exam question for PRMIA's 8002 exam

Question #: 82
Topic #: 1

[All 8002 Questions]

You are to perform a simple linear regression using the dependent variable Y and the independent variable X (Y = a + bX). Suppose that cov(X,Y)=10, var(X)= 5, and that the mean of X is 1 and the mean of Y is 2. What are the values for the regression parameters a and b?

Ab=0.5, a=2.5

Bb=0.5, a=1.5

Cb=2, a=4

Db=2, a=0

Show Suggested Answer

Suggested Answer: D

by Tarra at Jun 21, 2024, 05:36 PM

Limited Time Offer

25%

Off

Get Premium 8002 Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

Submit Cancel

Emiko

5 months ago

Hold up, did they just ask for the regression parameters? I think I'm missing something here.

upvoted 0 times

...

Kris

5 months ago

This is easy peasy lemon squeezy. I got this in the bag! Time to show off my stats skills and impress the examiner.

upvoted 0 times

Delsie

4 months ago

You're on a roll with those stats skills!

upvoted 0 times

...

Rolland

4 months ago

Thanks! I knew I had it right.

upvoted 0 times

...

Freida

5 months ago

Nice job! That's the correct answer.

upvoted 0 times

...

Glendora

5 months ago

A) b=0.5, a=2.5

upvoted 0 times

...

...

Celestine

5 months ago

Wait, is this a trick question? I better double-check my work. Can't have the exam proctors pulling a fast one on me!

upvoted 0 times

...

Goldie

6 months ago

Alright, time to put my math skills to the test! This should be a piece of cake.

upvoted 0 times

Freeman

4 months ago

Yes, that's correct! Good job!

upvoted 0 times

...

Nobuko

4 months ago

I think the answer is A) b=0.5, a=2.5

upvoted 0 times

...

Heidy

4 months ago

A) b=0.5, a=2.5

upvoted 0 times

...

Nobuko

4 months ago

That's correct! Good job!

upvoted 0 times

...

Della

5 months ago

I think the answer is A) b=0.5, a=2.5

upvoted 0 times

...

Dick

5 months ago

A) b=0.5, a=2.5

upvoted 0 times

...

...

Adelina

6 months ago

I think the answer is D) b=2, a=0 based on the means of X and Y

upvoted 0 times

...

Louann

6 months ago

I'm leaning towards C) b=2, a=4 because of the covariance and variance values

upvoted 0 times

...

Belen

6 months ago

I disagree, I believe the answer is B) b=0.5, a=1.5

upvoted 0 times

...

Felix

6 months ago

I think the answer is A) b=0.5, a=2.5

upvoted 0 times

...

Anisha

7 months ago

Hmm, this seems like a straightforward linear regression problem. Let me think through this step-by-step.

upvoted 0 times

Milly

6 months ago

C) b=2, a=4

upvoted 0 times

...

Jina

6 months ago

B) b=0.5, a=1.5

upvoted 0 times

...

Amina

6 months ago

A) b=0.5, a=2.5

upvoted 0 times

...

...