Unit 3 Review

Front

What does the correlation coefficient (r) indicate in a scatter plot?

Back

The correlation coefficient (r) indicates the strength and direction of a linear relationship between two variables. Values range from -1 to 1, where -1 indicates a strong negative correlation, 0 indicates no correlation, and 1 indicates a strong positive correlation.

Front

What is a scatter plot?

Back

A scatter plot is a graphical representation of two variables, where each point represents an observation. It helps to visualize the relationship between the variables.

Front

What does a correlation value of r = 0 mean?

Back

A correlation value of r = 0 means there is no linear relationship between the two variables.

Front

What does a strong positive correlation look like on a scatter plot?

Back

A strong positive correlation on a scatter plot appears as points that closely follow a straight line that slopes upwards from left to right.

Front

What does a strong negative correlation look like on a scatter plot?

Back

A strong negative correlation on a scatter plot appears as points that closely follow a straight line that slopes downwards from left to right.

Front

What is the range of possible values for the correlation coefficient (r)?

Back

The range of possible values for the correlation coefficient (r) is from -1 to 1.

Front

What does a correlation value of r = -0.45 indicate?

Back

A correlation value of r = -0.45 indicates a moderate negative correlation between the two variables.

Front

What is the probability of an event?

Back

The probability of an event is a measure of the likelihood that the event will occur, expressed as a number between 0 (impossible) and 1 (certain).

Front

How do you calculate the probability of an event?

Back

The probability of an event is calculated by dividing the number of favorable outcomes by the total number of possible outcomes.

Front

What is a two-way table?

Back

A two-way table is a statistical table that displays the frequency distribution of two categorical variables, allowing for the analysis of the relationship between them.