Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our Privacy Policy and User Agreement for details.

Successfully reported this slideshow.

Like this presentation? Why not share!

- AI and Machine Learning Demystified... by Carol Smith 1678155 views
- The AI Rush by Jean-Baptiste Dumont 470126 views
- 10 facts about jobs in the future by Pew Research Cent... 278206 views
- 2017 holiday survey: An annual anal... by Deloitte United S... 463005 views
- Harry Surden - Artificial Intellige... by Harry Surden 231756 views
- Inside Google's Numbers in 2017 by Rand Fishkin 795676 views

1,460 views

Published on

No Downloads

Total views

1,460

On SlideShare

0

From Embeds

0

Number of Embeds

1

Shares

0

Downloads

21

Comments

0

Likes

3

No embeds

No notes for slide

- 1. Statistics at HelpWithAssignment.com<br />(Correlation)<br />www.HelpWithAssignment.com<br />
- 2. In Statistics Correlation denotes the relation between to variables. <br />If change in one variable is initiating change in the other variable then it is said that there is a correlation between them. <br />There are two kinds of correlation. One is Positive Correlation and the other is Negative Correlation. <br />Correlation<br /> www.HelpWithAssignment.com<br />
- 3. Positive Correlation is said to exist when a change in one variable is causing a positive change in the other variable as well then it is called Positive Correlation. <br />For example, there is said to be a Positive Correlation between Income and spending. As income increases so is the purchasing power and spending. <br />Correlation<br /> www.HelpWithAssignment.com<br />
- 4. Negative Correlation on the other hand is a positive change in one variable causes a negative change in the other variable. <br />The best example for this is the demand theory in Economics. <br />We all know that when price of a product increases then the demand of that product decreases and when the price of the product decreases then the demand increases. <br />Correlation<br /> www.HelpWithAssignment.com<br />
- 5. The result of Correlation can only range between -1.00 and +1.00. If the answer is -1.00 then it is called perfect Negative Correlation and +1.00 denotes a perfect Positive Correlation. 0.00 denotes that there is no correlation at all. <br />Let us understand the process of Correlation with a good example.<br />Correlation<br /> www.HelpWithAssignment.com<br />
- 6. Correlation Example Problem<br /> www.HelpWithAssignment.com<br />
- 7. Correlation Example Problem<br /> www.HelpWithAssignment.com<br />
- 8. The Mean of X and Y are calculated to be 4.7 and 79.9 respectively. The Standard Deviation of X and Y are calculated to be 2.1628 and 11.5706 respectively. <br />Now, the formula for Correlation Coefficient or Karl Pearson Correlation (r) is <br />r =<br />Correlation Example Problem<br /> www.HelpWithAssignment.com<br />
- 9. Here, we can observe that the ∑XY = 3939; N is the means of X and Y, calculated to be 4.7 and 79.9 respectively. Standard Deviation is denoted by Sxand Sy which are calculated to be 2.1628 and 11.5706. When we apply the values we get<br />r = <br />Correlation Example Problem<br /> www.HelpWithAssignment.com<br />
- 10. r = = <br /> = 0.8156 = 0.82<br />Correlation Example Problem<br /> www.HelpWithAssignment.com<br />
- 11. The Coefficient Determination = r2 = 0.822 = 0.67 or 67%.<br />Therefore, we can conclude that the score in exams is directly related to the number of hours studied to a significant extent. And we can say that there is a positive correlation between the Number of hours Studied and the Scores obtained in Exams.<br />Correlation Example Problem<br /> www.HelpWithAssignment.com<br />
- 12. At HelpWithAssignment.com we provide best quality Assignment help, Homework help, Online Tutoring and Thesis and Dissertation help as well. For any of the above services you can contact us at http://www.helpwithassignment.com/ andhttp://www.helpwithassignment.com/statistics-assignment-help<br />HelpWithAssignment.com<br /> www.HelpWithAssignment.com<br />
- 13. You can follow us on our blogs at http://helpwithassignment.blogspot.com/ and<br />http://helpwithassignment.wordpress.com/<br />Thank You<br />HelpWithAssignment.com<br /> www.HelpWithAssignment.com<br />

No public clipboards found for this slide

Be the first to comment