# Question: What Is Considered A Weak Correlation?

## What is a weak correlation?

A weak correlation means that as one variable increases or decreases, there is a lower likelihood of there being a relationship with the second variable.

Earthquake magnitude and the depth at which it was measured is therefore weakly correlated, as you can see the scatter plot is nearly flat..

## Is Correlation good or bad?

Many folks make the mistake of thinking that a correlation of –1 is a bad thing, indicating no relationship. Just the opposite is true! A correlation of –1 means the data are lined up in a perfect straight line, the strongest negative linear relationship you can get.

## Which of the following correlation coefficients shows the strongest relationship?

The strongest linear relationship is indicated by a correlation coefficient of -1 or 1. The weakest linear relationship is indicated by a correlation coefficient equal to 0.

## Is 0.2 A strong correlation?

There is no rule for determining what size of correlation is considered strong, moderate or weak. … For this kind of data, we generally consider correlations above 0.4 to be relatively strong; correlations between 0.2 and 0.4 are moderate, and those below 0.2 are considered weak.

## How do you interpret a weak negative correlation?

Understanding Negative Correlation For example, if variables X and Y have a correlation coefficient of -0.1, they have a weak negative correlation, but if they have a correlation coefficient of -0.9, they would be regarded as having a strong negative correlation.

## What does a correlation of 0.25 mean?

When interpreting the value of the corrrelation coefficient, the same rules are valid for both Pearson’s and Spearman’s coefficient, and r values from 0 to 0.25 or from 0 to -0.25 are commonly regarded to indicate the absence of correlation, whereas r values from 0.25 to 0.50 or from -0.25 to -0.50 point to poor …

## Is 0.5 A weak correlation?

Correlation coefficients whose magnitude are between 0.3 and 0.5 indicate variables which have a low correlation.

## What is an example of a weak negative correlation?

A negative correlation is a relationship between two variables that move in opposite directions. … As another example, these variables could also have a weak negative correlation. A coefficient of -0.2 means that for every unit change in variable B, variable A experiences a decrease, but only slightly, by 0.2.

## What is an example of zero correlation?

A zero correlation exists when there is no relationship between two variables. For example there is no relationship between the amount of tea drunk and level of intelligence.

## What are the 5 types of correlation?

Types of Correlation:Positive, Negative or Zero Correlation:Linear or Curvilinear Correlation:Scatter Diagram Method:Pearson’s Product Moment Co-efficient of Correlation:Spearman’s Rank Correlation Coefficient:

## What does a perfect negative correlation mean?

A negative correlation between two variables means that one variable increases whenever the other decreases. … Perfect negative correlation means that the relationship is demonstrated consistently over time. A decrease in one variable predictably meets with a comparable increase in the other.

## Is 0.4 A strong correlation?

Generally, a value of r greater than 0.7 is considered a strong correlation. Anything between 0.5 and 0.7 is a moderate correlation, and anything less than 0.4 is considered a weak or no correlation.

## Is a weak negative correlation?

A negative correlation can indicate a strong relationship or a weak relationship. Many people think that a correlation of –1 indicates no relationship. But the opposite is true. … The minus sign simply indicates that the line slopes downwards, and it is a negative relationship.

## What is an example of a weak positive correlation?

The correlation coefficient often expressed as r, indicates a measure of the direction and strength of a relationship between two variables. … A correlation of -0.97 is a strong negative correlation while a correlation of 0.10 would be a weak positive correlation.

## What is a weak R value?

r > 0 indicates a positive association. • r < 0 indicates a negative association. • Values of r near 0 indicate a very weak linear relationship.