Data Visualization Quiz

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Questions and Answers

What is the formula for calculating the slope in the context of linear trends for slope-intercept form?

  • $m = \frac{x_2 - x_1}{y_2 - y_1}$
  • $m = \frac{y_2 - y_1}{x_1 - x_2}$
  • $m = \frac{x_1 - x_2}{y_2 - y_1}$
  • $m = \frac{y_2 - y_1}{x_2 - x_1}$ (correct)

In the context of correlation coefficient, what does an $r$-value of -1 indicate?

  • An absence of correlation between the variables
  • A strong best fit increasing linear association plot
  • A weak and randomly scattered plot, neither increasing nor decreasing, with no linear association
  • A strong best fit decreasing linear association plot (correct)

What represents the middle value of the upper half in the five number summary of a box and whisker plot?

  • Median
  • Q3 (correct)
  • Maximum
  • Q1

In the context of causation, what does a nonlinear correlation imply?

<p>An absence of correlation between the variables (A)</p> Signup and view all the answers

What does the minimum value represent in a dot plot on a one-dimensional number line?

<p>Least value (A)</p> Signup and view all the answers

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