Refer to the Journal of Astrophysics & Astronomy (Mar./Jun. 2003) study of

Refer to the Journal of Astrophysics & Astronomy (Mar./Jun. 2003) study of redshifts in Quasi-Stellar Objects (QSOs), Exercise 10.4. Recall that simple linear regression was used to model the magnitude (y) of a QSO as a function of redshift level (x). In addition to the least-squares line, ŷ = 18.13 + 6.21x, the coefficient of correlation was determined as r = .84.

a. Interpret the value of r in the words of the problem.

b. What is the relationship between r and the estimated
slope of the line?

c. Find the value of r2 and interpret its value

Data from Exercise 10.4

Astronomers call a shift in the spectrum of galaxies a “redshift.” A correlation between redshift level and apparent magnitude (i.e., brightness on a logarithmic scale) of a Quasi-Stellar Object (QSO) was discovered and reported in the Journal of Astrophysics & Astronomy (Mar./Jun. 2003). Simple linear regression was applied to data collected for a sample of over 6,000 QSOs with confirmed redshift.

How Our Website Works

1. FILL IN OUR SIMPLE ORDER FORM

It has never been easier to place your order. Fill in the initial requirements in the small order form located on the home page and press “continue” button to proceed to the main order form or press “order” button in the header menu. Starting from there let our system intuitively guide you through all steps of ordering process.

2. PROCEED WITH THE PAYMENT

All your payments are processed securely through PayPal. This enables us to guarantee a 100% security of your funds and process payments swiftly.

3. WRITER ASSIGNMENT

Next, we match up your order details with the most qualified freelance writer in your field.

4. WRITING PROCESS

Once we have found the most suitable writer for your assignment, they start working on a masterpiece just for you!

5. DELIVERY

Once finished, your final paper will be available for download through your personal dashboard. You will also receive an email notification with a copy of your paper attached to it. Sometimes, the writer may leave a note for you about the order in case there is any additional information that they need to give you.

Leave a Reply

Your email address will not be published.