Scatter Plots

Front

What is a scatter plot?

Back

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

Front

What does a negative correlation in a scatter plot indicate?

Back

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

Front

What does a positive correlation in a scatter plot indicate?

Back

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

Front

What is the range of the correlation coefficient (r)?

Back

The correlation coefficient (r) ranges from -1 to 1, where -1 indicates a perfect negative correlation, 0 indicates no correlation, and 1 indicates a perfect positive correlation.

Front

What does an r value of 0.3 indicate about the correlation?

Back

An r value of 0.3 indicates a weak positive correlation between the two variables.

Front

How can you estimate a value from a scatter plot?

Back

You can estimate a value by locating the corresponding point on the scatter plot that represents the given variable and reading the value of the other variable.

Front

What is the purpose of using scatter plots in data analysis?

Back

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

Front

What does it mean if a scatter plot shows no clear pattern?

Back

If a scatter plot shows no clear pattern, it suggests that there is little to no correlation between the two variables.

Front

What is the significance of outliers in a scatter plot?

Back

Outliers are data points that fall far from the trend of the rest of the data, and they can significantly affect the correlation and interpretation of the data.

Front

How can you determine the strength of a correlation from a scatter plot?

Back

The strength of a correlation can be determined by how closely the points cluster around a line of best fit; tighter clustering indicates a stronger correlation.