Find the value of r2 and explain its meaning

Assignment Help Other Subject
Reference no: EM131445062


The paired data below consists of test scores and hours of preparation for 5 randomly selected students. Use this data set to answer the questions below:

x Hours of preparation 5 2 9 6 10

y Test score 64 48 72 73 80

1. Use the given data to find the correlation coefficient r, regression equation and scatter plot in MS Excel.

2. Based on the linear correlation coefficient r, is this a good model? Explain.

3. What is the best predicted test score for a student who spent 7 hours preparing for the test?

4. Find the standard error . Use formula or MS Excel.

5. Find the 99% prediction interval for the test score of a person who spent 7 hours preparing for the test.

6. Find the explained variation.

7. Find the unexplained variation.

8. Find the total variation.

9. Find the value of r2 and explain its meaning.

10. If the data point ( 3, 100) is added to the data set, how would this effect the results of the regression analysis? Is this data point an outlier, influential point or both? Explain.

Reference no: EM131445062

How serious is the threat of catastrophic terrorism

How serious is the threat of catastrophic terrorism?Can catastrophic attacks be prevented?How would a catastrophic terrorist attack affect American homeland security culture?A

Negatively impacting health care currently

Identify and explain at least two events that are negatively impacting health care currently. Tell us why you think these items are negatively impacting the access to care, an

What are the two most serious issues faced by women

In your opinion, what are the two most serious issues faced by women on a global scale? Discuss the root causes of these problems and why they must be addressed to achieve d

How did they know the volcano was going to erupt

You are a news reporter for a local paper and have just learned volcanoes are the most fascinating phenomena on Earth. The name the Volcano you are reporting on. How did they

Concept of leadership relates to your personal expectations

Compare and contrast the author's point of view with another theory or your own beliefs. Describe a personal experience where you personally witnessed an example of strong lea

Create a survey based on the identified characteristics

Some may believe that being “gentleman” or a “lady” in today’s society is an outdated notion, but others may disagree. Briefly summarize the main characteristics of a well-

Nolan contracts for the sale of an ancient vase

Nolan contracts for the sale of an ancient vase, a Renaissance painting, and a modern mansion to Olga. Nolan breaches the contract. Olga files a suit against him. The court wi

How balance scorecard method could be use to identify method

MHA 626- For your initial post, state how the balanced scorecard method could be used to identify performance procedures, methods, and responsibilities for controlling set p


Write a Review

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd