Scatter Plots and Association

Front

What is a scatter plot?

Back

A scatter plot is a graphical representation of two variables where each point represents an observation in the dataset, showing the relationship between the variables.

Front

What does it mean if a scatter plot shows no association?

Back

It means that there is no predictable pattern or correlation between the two variables being plotted.

Front

What is a positive association in a scatter plot?

Back

A positive association occurs when an increase in one variable corresponds to an increase in the other variable, resulting in a rising trend in the scatter plot.

Front

What is a negative association in a scatter plot?

Back

A negative association occurs when an increase in one variable corresponds to a decrease in the other variable, resulting in a falling trend in the scatter plot.

Front

What does correlation refer to in the context of scatter plots?

Back

Correlation refers to the strength and direction of a linear relationship between two variables, which can be positive, negative, or zero.

Front

How can you identify a linear association in a scatter plot?

Back

A linear association can be identified if the points in the scatter plot roughly form a straight line, indicating a consistent relationship between the variables.

Front

What is the significance of the last digit of a phone number in a scatter plot analysis?

Back

The last digit of a phone number is typically a categorical variable and is unlikely to show any meaningful association with continuous variables like distance driven to work.

Front

What does it mean if a scatter plot has a strong correlation?

Back

A strong correlation means that the points in the scatter plot are closely clustered around a straight line, indicating a strong relationship between the two variables.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation implies that one variable directly affects the other.

Front

What type of relationship does Graph A represent if it shows no relationship?

Back

Graph A represents a scatter plot with no discernible pattern or correlation between the variables.