Questions tagged [pearsons-correlation-coefficient]

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Low Pearson correlation coefficient between stable signals and high Pearson correlation coefficient between unstable signals

I calculated the Pearson correlation coefficient between two signals, that described the state of the unit. During normal operation of the unit, both signals were fairly stable and fluctuated very ...
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1answer
19 views

What statistical method should i use to find Correlation between number of days and AmountEarned

I am new to Data Science and I have a python data frame with Number of days, CountofJobs, and AmountEarned what statistical method should I use to find a correlation between Days and AmountEarned. <...
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26 views

Determine relationship between users and age?

I would like to understand how to find an association between users, spam and email's age. My dataset looks like as follows: ...
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2answers
110 views

what is the difference in terms namely Correlation, correlated and collinearity?

A website says Correlation refers to an increase/decrease in a dependent variable with an increase/decrease in an independent variable. Collinearity refers to two or more independent variables acting ...
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Correlation between numeric attributes

I am trying to do some correlation analysis on my dataset. After data cleansing, I have two columns of numeric values, Rating and CocoaPerc. Using Pearson's Correlation Coefficient, Sperman's Rank ...
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2answers
626 views

What is the meaning of a quadratic relation when r = 0?

A website (on page 4) says: The correlation coefficient is a measure of linear relationship and thus a value of r = 0 does not imply there is no relationship between the variables. For ...
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1answer
96 views

Does Karl Pearson correlation indicate linear relationship between two variables ? Or it indicates nonlinear relationship or simply the correlation?

Wikipedia and literature do not seem to convey correct interpretation of Karl Pearson correlation. A few authors interpret it as a linear correlation or association. To me it simply tells direction ...
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37 views

Professionals appear to interpret sample correlation (e.g. Karl Pearson) as if it represents linear correlation. Is it the correct interpretation? [closed]

I am stressed following the wrong interpretation. What is the correct way of understanding a correlation coefficient.
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43 views

Correlation coefficient and non linear association [closed]

Correlation and Linear Regression Author: Lisa Sullivan, PhD Professor of Biostatistics Boston University School of Public Health Says there may be non-linear association which the correlation ...
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1answer
39 views

Transforming negative correlated non linear variable to linear positive correlated variable

At my office, I am stuck in a weird situation. I am asked to perform a regression algorithm on the data, in which the target variable is continuous having values range between 0.6 to 0.9 with 8 digits ...
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1answer
347 views

Calibrating Correlation

I am facing a weird problem in my on going project and thought if someone here could help me out with this. Actually I have large data set. I have to perform a regression task on top of that. While ...
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1answer
9k views

Pearson vs Spearman vs Kendall

What are the characteristics of three correlation coefficients and what are the comparisons of each correlation coefficients, Assumptions. Can somebody kindly take me through the concepts