TWCP 3C: Trend Lines and Regression

Front

What is correlation?

Back

Correlation is a statistical measure that describes the extent to which two variables change together. It can be positive, negative, or none.

Front

What does a positive correlation indicate?

Back

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

Front

What does a negative correlation indicate?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

Front

What does 'no correlation' mean?

Back

No correlation means that there is no predictable relationship between the two variables.

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points.

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatter plot, showing the trend of the data.

Front

How do you determine the line of best fit?

Back

The line of best fit can be determined using methods such as least squares regression, which minimizes the distance between the data points and the line.

Front

What is regression analysis?

Back

Regression analysis is a statistical method used to determine the relationship between a dependent variable and one or more independent variables.

Front

What is the purpose of using trend lines in data analysis?

Back

Trend lines help to visualize the general direction of data points and can be used to make predictions.

Front

What is the formula for a linear regression line?

Back

The formula for a linear regression line is y = mx + b, where m is the slope and b is the y-intercept.