# Consider the simple linear regression model Yi = 1 + 2Xi + ui .

Consider the simple linear regression model Yi = ÃŽÂ²1 + ÃŽÂ²2Xi + ui . Show that the estimate of ÃŽÂ²2 can be written as ÃŽÂ²Ã‹â€  2 = ÃÆ’Ã‹â€ xy ÃÆ’Ã‹â€  2 x , where Ã‹â€ ÃÆ’xy is the estimate of the covariance between Y and X and Ã‹â€ ÃÆ’ 2 x is the estimate of the variance of X. (Hint: Write out ÃÆ’Ã‹â€ xy ÃÆ’Ã‹â€  2 x in its summation form to get an idea of what your end goal is. Start with the normal equations (the first order conditions for minimizing RSS) and manipulate until you obtain the desired result.)

## Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
\$26
The price is based on these factors:
Number of pages
Urgency
Basic features
• Free title page and bibliography
• Unlimited revisions
• Plagiarism-free guarantee
• Money-back guarantee
On-demand options
• Writer’s samples
• Part-by-part delivery
• Overnight delivery
• Copies of used sources
Paper format
• 275 words per page
• 12 pt Arial/Times New Roman
• Double line spacing
• Any citation style (APA, MLA, Chicago/Turabian, Harvard)

# Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

### Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

### Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

### Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.