Counts for a categorical variable are often expressed as percentages of the total.
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Q2: Comparing a numerical variable across two or
Q3: Correlation is not useful for describing the
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
Q8: The scatterplot is a graphical technique used
Q9: A trend line on a scatterplot is
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
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