After conducting a survey of his students, a professor reported that \"There app

Question

After conducting a survey of his students, a professor reported that "There appears to be a strong association between grade point average and whether or not a student works." What is the problem with this statement.

Correlation is only between two quantitative variables.

Correlation is not linear.

All of the above.

Correlation may have outliers.

Correlation does not imply causation.

Correlation is only between two quantitative variables.

Correlation is not linear.

All of the above.

Correlation may have outliers.

Correlation does not imply causation.

Explanation / Answer

Correlation, measures the linear association between two quantitative variables not for categorical variables.

We can clearly see that,

whether or not a student works. It is categorical data.

Since , it may be data in Yes, or No format.

Correlation measures the strength of a linear association between two quantitative variables. Whether or not a student works is a categorical variable, so correlation cannot be calculated between GPA and whether or not a student works.

Option a) is correct.

Correlation is only between two quantitative variables.

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