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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?
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?
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?
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?
In the context of causation, what does a nonlinear correlation imply?
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What does the minimum value represent in a dot plot on a one-dimensional number line?
What does the minimum value represent in a dot plot on a one-dimensional number line?
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