Scatter plots- Lines of Best Fit

Front

What is a scatter plot?

Back

A scatter plot is a graphical representation of two variables where each point represents an observation in the dataset, showing the relationship between the variables.

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatter plot, indicating the general direction of the data points.

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How do you determine the line of best fit visually?

Back

The line of best fit can be determined visually by drawing a line that minimizes the distance between itself and all the points on the scatter plot.

Front

What does a positive association in a scatter plot indicate?

Back

A positive association indicates that as one variable increases, the other variable also tends to increase.

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What does a negative association in a scatter plot indicate?

Back

A negative association indicates that as one variable increases, the other variable tends to decrease.

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What does it mean if a scatter plot shows no relationship?

Back

If a scatter plot shows no relationship, it means that there is no discernible pattern or correlation between the two variables.

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What factors can affect the fit of a trend line?

Back

Factors that can affect the fit of a trend line include the distribution of data points, outliers, and the overall trend of the data.

Front

What is the purpose of a trend line in data analysis?

Back

The purpose of a trend line is to summarize the relationship between variables and to make predictions based on the data.

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How can you tell if a trend line is a good fit for the data?

Back

A trend line is a good fit if it closely follows the pattern of the data points, with most points being near the line.

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What is the significance of outliers in a scatter plot?

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Outliers are data points that differ significantly from other observations and can skew the results and affect the accuracy of the trend line.