Blazer Time Activity 1: Scatterplots & Trendlines

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does a trendline represent in a scatterplot?

Back

A trendline is a line that best represents the data points in a scatterplot, indicating the general direction of the data.

Front

What is positive correlation?

Back

Positive correlation occurs when an increase in one variable leads to an increase in another variable.

Front

What is negative correlation?

Back

Negative correlation occurs when an increase in one variable leads to a decrease in another variable.

Front

What does no correlation mean?

Back

No correlation means there is no apparent relationship between the two variables being analyzed.

Front

How do you determine the strength of a correlation?

Back

The strength of a correlation can be determined by how closely the data points cluster around the trendline; strong correlations have points that are close to the line.

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 scatterplot, minimizing the distance between the line and all data points.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess the relationship between two variables and to identify trends, patterns, or outliers.

Front

What does it mean if a scatterplot shows a positive linear association?

Back

A positive linear association means that as one variable increases, the other variable also tends to increase in a linear manner.

Front

What does it mean if a scatterplot shows a negative linear association?

Back

A negative linear association means that as one variable increases, the other variable tends to decrease in a linear manner.