A trend line on a scatterplot is a line or a curve that "fits" the scatter as well as possible.
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Q4: The correlation between two variables is unitless
Q5: Correlation is a single-number summary of a
Q6: Strongly related variables may have a correlation
Q7: Counts for a categorical variable are often
Q8: The scatterplot is a graphical technique used
Q10: We cannot attempt to interpret correlations numerically,with
Q11: If the standard deviations of X and
Q12: We can use side-by-side boxplots to compare
Q13: The advantage that correlation has over covariance
Q14: Correlation is affected by the measurement scales
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