3.5 Scatterplots Review #2

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables, showing the relationship between them using points on a Cartesian plane.

Front

How can you interpret a scatterplot?

Back

You can interpret a scatterplot by observing the pattern of points to determine if there is a correlation between the two variables, such as positive, negative, or no correlation.

Front

What does a positive correlation in a scatterplot indicate?

Back

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

Front

What does a negative correlation in a scatterplot indicate?

Back

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

Front

What does it mean if there is no correlation in a scatterplot?

Back

No correlation means that there is no discernible relationship between the two variables; changes in one do not predict changes in the other.

Front

How do you predict values using a scatterplot?

Back

You can predict values by finding the trend line or pattern in the scatterplot and estimating the value of one variable based on the value of the other.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visualize the relationship between two quantitative variables, helping to identify trends, correlations, and outliers.

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What is an outlier in a scatterplot?

Back

An outlier is a data point that significantly differs from the other points in the scatterplot, which may indicate an anomaly or error in data collection.

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How can you determine the best fit line in a scatterplot?

Back

The best fit line, or trend line, can be determined by using statistical methods such as linear regression to minimize the distance between the line and all data points.

Front

What is the significance of the slope of the best fit line?

Back

The slope of the best fit line indicates the rate of change between the two variables; a steeper slope means a stronger relationship.