Bivariate Data- Scatterplots/Trend Lines

Front

What is bivariate data?

Back

Bivariate data involves two variables and is used to determine the relationship between them.

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of bivariate data where each point represents an observation.

Front

What does a trend line represent in a scatterplot?

Back

A trend line represents the general direction or pattern of the data points in a scatterplot.

Front

How can you identify a linear relationship in a scatterplot?

Back

A linear relationship can be identified if the data points roughly form a straight line.

Front

What does a positive correlation indicate?

Back

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

Front

What does a negative correlation indicate?

Back

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

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatterplot, minimizing the distance from all points.

Front

How do you interpret the slope of a trend line?

Back

The slope of a trend line indicates the rate of change between the two variables.

Front

What is the purpose of making predictions using a trend line?

Back

The purpose is to estimate the value of one variable based on the value of another variable.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that differ significantly from other observations and can affect the trend line and correlation.