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

Linear modelling, what is a difference between a linear model and a linear ...

what is a difference between a linear model and a linear model

Revenues , why are revenues an important number in financial statements?

why are revenues an important number in financial statements?

Normal curve and the standard deviation, What is the relationship between t...

What is the relationship between the normal curve and the standard deviation? Name and explain three special features of a normal distribution

Estimate the national level ndp, In the 2011 federal election, 30.6% of the...

In the 2011 federal election, 30.6% of the electorate voted for the New Democratic Party (NDP). (a) A year later, a national poll of 1836 respondents indicated that 36% support the

Interpret predictability and behaviou, Shafts are cut to length by two mach...

Shafts are cut to length by two machines, A and B. Each machine cuts 50 percent of all shafts in approximately the same amount of time. Machine A's shafts are all good, but Machine

Linear power supply, Linear Power Supply Uses a transformer to convert volt...

Linear Power Supply Uses a transformer to convert voltage from the mains (wall outlet) to a different voltage. With a transformer present, almost any voltage can be obtained. If a

Time series, Explain how you would decide whether to use the additive model...

Explain how you would decide whether to use the additive model or the multiplicative model to analyse a time series.

Normal distribution, Lifts usually have signs indicating their maximum capa...

Lifts usually have signs indicating their maximum capacity. Consider a sign in a lift that reads “maximum capacity 1400kg or 20 persons”. Suppose that the weights of lift-users are

Generate a hypothesis test , An instructor wants to determine which of his ...

An instructor wants to determine which of his students are A students and which are B students (this is a graduate course, so clearly all the students are either A or B stu

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