Exploring Scatterplot Associations

This video tutorial introduces scatter plots, explaining their use in statistics to analyze bivariate data and make predictions. It covers real-life examples, types of associations (positive, negative, no association), and how to analyze scatter plots for trends and patterns. The tutorial also discusses determining linearity and strength of scatter plots, and provides practice with identifying associations between variables.

What is a scatter plot used for?

• To show categorical data using lines

• To show textual data using points

• To show numerical data using points

• To show numerical data using bars

What is bivariate data?

• Data with one variable

• Data with two variables

• Data with three variables

• Data with no variables

How many shoppers did Susie survey?

• 14

• 12

• 10

• 16

What does a positive relationship in a scatter plot indicate?

• There is no relationship between the variables

• As one variable increases, the other also increases

• As one variable decreases, the other increases

• As one variable increases, the other decreases

What does a negative relationship in a scatter plot indicate?

• There is no relationship between the variables

• As one variable increases, the other increases

• As one variable increases, the other decreases

• As one variable decreases, the other decreases

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

• The variables are moving together

• The variables are both increasing

• The variables are moving in opposite directions

• The change in one variable has no effect on the other

What is a linear scatter plot?

• A scatter plot with random points

• A scatter plot with no points

• A scatter plot where the points form a curved line

• A scatter plot where the points form a straight line

What is a strong association in a scatter plot?

• When there are no data points

• When the data points form a curved line

• When the data points are close together

• When the data points are widely spread out

What type of association would you expect between the hours a person studies and their grade on an exam?

• No association

• Inverse

• Positive

• Negative

What type of association would you expect between the number of letters in a person's name and their IQ?

• Negative

• Inverse

• Positive

• No association