Asked by: Irenea Alzaga
science physics

What does a weak linear relationship mean?

Last Updated: 24th April, 2020

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If r is close to zero, it means that the data has a very weak linear relationship or no linear relationship. When r is close to zero, it is possible that the data has a strong curvilinear relationship (as we saw in this example).

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Correspondingly, what is a weak linear relationship?

The correlation coefficient, denoted by r, is a measure of the strength of the straight-line or linear relationship between two variables. Values between 0 and 0.3 (0 and -0.3) indicate a weak positive (negative) linear relationship via a shaky linear rule.

Likewise, what does a strong linear relationship mean? The strongest linear relationship occurs when the slope is 1. This means that when one variable increases by one, the other variable also increases by the same amount. The strength of the relationship between two variables is a crucial piece of information.

Regarding this, 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. If the cloud is very flat or vertical, there is a weak correlation.

Is 0.4 A strong correlation?

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. When we are studying things that are more easily countable, we expect higher correlations.

Related Question Answers

Rosalee Bajukoff

Professional

How do you know if a correlation is strong or weak?

When the r value is closer to +1 or -1, it indicates that there is a stronger linear relationship between the two variables. A correlation of -0.97 is a strong negative correlation while a correlation of 0.10 would be a weak positive correlation.

Zhiming Amilibia

Professional

How do you describe a linear relationship?

Linear form means that as X increases, Y increases or decreases at a constant rate. Positive direction means that Y increases when X increases; and negative direction means that Y decreases when X increases. The last component of the relationship between two variables is strength.

Kelley Penke

Professional

Is there a linear relationship?

As its name suggests, a linear relationship is any equation that, when graphed, gives you a straight line. Linear relationships are beautifully simple in this way; if you don't get a straight line, you know you've either graphed it wrong or the equation is not a linear relationship.

Clare Papenheinrich

Explainer

Is 0.7 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.

Aminetou Scholze

Pundit

How do you explain 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.

Makeda Thunissen

Pundit

What does it mean to have 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.

Bru Turton

Pundit

What is a good correlation?

The values range between -1.0 and 1.0. A calculated number greater than 1.0 or less than -1.0 means that there was an error in the correlation measurement. A correlation of -1.0 shows a perfect negative correlation, while a correlation of 1.0 shows a perfect positive correlation.

Daylos Añazco

Pundit

How do you interpret correlation?

Degree of correlation:
  1. Perfect: If the value is near ± 1, then it said to be a perfect correlation: as one variable increases, the other variable tends to also increase (if positive) or decrease (if negative).
  2. High degree: If the coefficient value lies between ± 0.50 and ± 1, then it is said to be a strong correlation.

Abdurrahman Privitera

Pundit

How do you interpret a correlation?

Understanding Correlation
Anytime the correlation coefficient, denoted as r, is greater than zero, it's a positive relationship. Conversely, anytime the value is less than zero, it's a negative relationship. A value of zero indicates that there is no relationship between the two variables.

Beinat Bundlechner

Teacher

Can a weak correlation be significant?

However, a weak correlation can be statistically significant, if the sample size is large enough.

Moriba Vanderbruck

Teacher

What are some examples of correlation?

Common Examples of Positive Correlations. The more time you spend running on a treadmill, the more calories you will burn. Taller people have larger shoe sizes and shorter people have smaller shoe sizes.

Elson Lipschuetz

Teacher

Is 0.8 A strong correlation?

The coefficient of correlation is represented by "r" and it has a range of -1.00 to +1.00. A coefficient of correlation of +0.8 or -0.8 indicates a strong correlation between the independent variable and the dependent variable. An r of +0.20 or -0.20 indicates a weak correlation between the variables.

Cleofe Imkampe

Teacher

How do you explain Pearson correlation?

Pearson's Correlation Coefficient. Correlation is a technique for investigating the relationship between two quantitative, continuous variables, for example, age and blood pressure. Pearson's correlation coefficient (r) is a measure of the strength of the association between the two variables.

Mahayuba Gsaenger

Reviewer

Do the two variables have a linear relationship?

When two variables are perfectly linearly related, the points of a scatterplot fall on a straight line as shown below. With behavioral data, there is almost never a perfect linear relationship between two variables. The more the points tend to fall along a straight line the stronger the linear relationship.

Yonghai Aharrar

Reviewer

Is 0.5 A strong correlation?

Weak positive correlation would be in the range of 0.1 to 0.3, moderate positive correlation from 0.3 to 0.5, and strong positive correlation from 0.5 to 1.0. The stronger the positive correlation, the more likely the stocks are to move in the same direction.

Xiker Schulte

Reviewer

How do you know if a scatter plot shows a linear relationship?

If the line on a line graph falls to the right, it indicates an indirect relationship. A linear relationship appears as a straight line either rising or falling as the independent variable values increase. A negative correlation appears as a recognizable line with a negative slope .

Latviešu Csordas

Reviewer

Is 0.25 A strong correlation?

Generally yes, a correlation of 0.25 is considered substantial (not necessarily high) depending on what you are looking at. I've also seen 0.3 as a cut-off point but we learned that a corr of 0.2 or higher already hints at a low positive correlation. There's really no number that indicates significance.

Donovan Tsvibak

Supporter

What does a correlation of 0.9 mean?

If the value of the correlation coefficient is between 0.1 to 0.5 or -0.1 and -0.5, the two variables in the relationship are said to be weakly related. If the value of the correlation coefficient is between 0.9 and 1 or -0.9 and -1, the two variables are extremely strongly related.

Kathe Nonnenfeind

Supporter

What is a good R value for correlation?

The main result of a correlation is called the correlation coefficient (or "r"). It ranges from -1.0 to +1.0. The closer r is to +1 or -1, the more closely the two variables are related. If r is close to 0, it means there is no relationship between the variables.