A correlation coefficient represents the strength and direction of a linear relationship between two variables. A correlation coefficient close to zero indicates a weak relationship between the variables, where changes in one variable do not consistently predict changes in the other. However, it is important to note that a correlation coefficient of zero does not necessarily mean there is no relationship between the variables, as non-linear relationships may exist.
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None of them.
Assuming that all of these coefficients are based on samples of the same size then the weakest correlation is -0.01 because its absolute value (0.01) is the smallest.
The weakest correlation coefficient is 0, which means there is absolutely no relationship between the two variables you are correlating.
The is no Fajita scale. The Fujita scale provides basic standards by which to assess the damage done by a tornado. Based on the severity of the damage a tornado is assigned a rating, which can range from F0 for the weakest tornadoes to F5 for the strongest.