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Correlation is when two things are related or have similar properties. They can exist independently. Causation means that one thing made the other thing happen
Correlation is when two things are related or have similar properties and they can exist independently. Causation means that one thing made the other thing happen.
If measurements are taken for two (or more) variable for a sample , then the correlation between the variables are the sample correlation. If the sample is representative then the sample correlation will be a good estimate of the true population correlation.
Evidence that there is no correlation.
They can be positive correlation, negative correlation or no correlation depending on 'line of best fit'