Algebra I IM Unit 3: Two-Variable Statistics Review

Front

What is relative frequency?

Back

Relative frequency is the ratio of the number of times an event occurs to the total number of trials or observations, often expressed as a percentage.

Front

What does a positive correlation indicate?

Back

A positive correlation means that as one variable increases, the other variable also increases.

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables, with points representing individual data points.

Front

What does a correlation coefficient of 1 indicate?

Back

A correlation coefficient of 1 indicates a perfect positive linear relationship between two variables.

Front

What does a correlation coefficient of -1 indicate?

Back

A correlation coefficient of -1 indicates a perfect negative linear relationship between two variables.

Front

What does a correlation coefficient of 0 indicate?

Back

A correlation coefficient of 0 indicates no linear relationship between the two variables.

Front

How do you interpret a scatter plot with a positive trend?

Back

A scatter plot with a positive trend shows that as one variable increases, the other variable tends to increase as well.

Front

What is the purpose of using two-variable statistics?

Back

Two-variable statistics are used to analyze the relationship between two different variables and understand how they interact.

Front

What is the formula for calculating relative frequency?

Back

Relative Frequency = (Number of favorable outcomes) / (Total number of outcomes) * 100%.

Front

What is an example of a positive correlation in real life?

Back

An example of a positive correlation is the relationship between study time and test scores; generally, more study time leads to higher test scores.