Bivariate Data

Front

What is bivariate data?

Back

Bivariate data is a set of data that involves two different variables, often represented as (x, y) pairs.

Front

What does a scatterplot show?

Back

A scatterplot displays the relationship between two variables by plotting data points on a two-dimensional graph.

Front

What is a trend line?

Back

A trend line is a straight line that best represents the data points on a scatterplot, indicating the general direction of the data.

Front

What does it mean if there is no relationship between x and y values?

Back

It means that changes in the x values do not affect the y values, and the data points do not show any pattern.

Front

How can you estimate future values using a trend line?

Back

You can extend the trend line beyond the existing data points to predict future values based on the established pattern.

Front

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

Back

The purpose is to summarize the relationship between variables and make predictions based on the observed data.

Front

What does it indicate if the trend line slopes upwards?

Back

An upward slope indicates a positive correlation, meaning as the x-value increases, the y-value also increases.

Front

What does it indicate if the trend line slopes downwards?

Back

A downward slope indicates a negative correlation, meaning as the x-value increases, the y-value decreases.

Front

What is an example of no association in bivariate data?

Back

An example is when the data points are scattered randomly without any discernible pattern or trend.

Front

How do you determine the best trend line for a set of data?

Back

The best trend line minimizes the distance between the line and all data points, often using methods like least squares.