Explain correlation coefficient, Basic Statistics

Assignment Help:

Q. Explain Correlation Coefficient?

Ans.

The strength of a linear correlation is determined by how precisely the y variable shifts as the x variable increases. The two pictures on the right show data with a higher correlation than those on the left.

1619_Explain Correlation Coefficient.png

Data is said to have a perfect correlation if all points lie exactly along a line.

259_Explain Correlation Coefficient1.gif

The correlation coefficient, r, is a measure of the strength of the correlation. It is a number between 1 and +1. +1 indicates a perfect positive correlation and 1 indicated a perfect negative correlation. If r is positive, then there is a positive correlation between the two variables. If r is negative, there is a negative correlation between the variables.


Related Discussions:- Explain correlation coefficient

Homework, Problems 15. An art professor was interested in seeing what si...

Problems 15. An art professor was interested in seeing what size group is best to prime the pump so to speak to encourage strangers to gather together in front of various exhibi

Histogram and Historigram, What are the differences between Histogram and H...

What are the differences between Histogram and Historigram, list out the points.

Identify the test statistic, The National Center for Health Statistics rece...

The National Center for Health Statistics recently released a report that stated 70% of adults do not exercise regularly. A researcher decided to test whether the results on a stat

Find mode and median, The following data shows marks obtained by 40 student...

The following data shows marks obtained by 40 students in a Statistics test. 75 99 72 54 25 40 65 32 69 10 85 48 52 80  63 64 35 62 51 71 67 57 95 74 56 69 61  49 45 63 39

Tools., what do you mean by correct and remedy the equipment trouble as ins...

what do you mean by correct and remedy the equipment trouble as instructed by the expert.

Aggregate expenditure method, Problem Construct a consumer price index ...

Problem Construct a consumer price index for the information given by using  (i) Aggregate expenditure method, (ii) Family budget method. Commodities

What is the probability, Suppose the entire cola industry produces only two...

Suppose the entire cola industry produces only two colas viz., Pepsi and Coke.  Given that a person last purchased Pepsi, there is 90% that his next purchase will be Pepsi.  Given

Write Your Message!

Captcha
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