Statistics with Bivariate Data

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bivariate data

Back

data relating two quantitative variables that can be represented by a scatterplot (typically x and y)

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data

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information that is collected about people, events, or objects

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discrete data

Back

data with finite and distinct values that can be counted, not inclusive of in-between values (graph looks like scatter plot)

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linear relationship

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a relationship with a constant rate of change represented by a graph that forms a straight line

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scatterplot

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a graphical representation used to display the relationship between discrete data pairs (data points are graphed individually)

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slope

Back

the steepness of a line; rate of change in y (vertical) compared to change in x (horizontal), or or , denoted as m in y = mx + b. Found with rise/run.

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trend line

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the line that best fits the data points of a scatterplot (goes through middle of the data)

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unit rate

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a ratio between two different units where one of the terms is 1 (Same as the constant of proportionality 'k')

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y-intercept

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y coordinate of a point at which the relationship crosses the y-axis meaning the x coordinate is equal to zero, denoted as b in y = mx + b and the ordered pair (0, b)

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Positive Association

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as x increases, y increases. Trend line would have a positive slope.