Scatter Plots/Trend Lines/Correlation Co./Residuals S-ID.6,7&8

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 on a two-dimensional axis.

Front

What does a positive correlation indicate in a scatter plot?

Back

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

Front

What does a negative correlation indicate in a scatter plot?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What does 'no association' mean in the context of correlation?

Back

'No association' means that there is no discernible relationship between the two variables in the scatter plot.

Front

What is a trend line?

Back

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

Front

How do you interpret the slope of a trend line?

Back

The slope of a trend line indicates the rate of change between the two variables; it shows how much one variable changes for a unit change in the other variable.

Front

What are residuals in the context of regression analysis?

Back

Residuals are the differences between the actual values and the predicted values from a regression model.

Front

What does a positive residual indicate?

Back

A positive residual indicates that the actual value is greater than the predicted value.

Front

What does a negative residual indicate?

Back

A negative residual indicates that the actual value is less than the predicted value.

Front

What is the purpose of analyzing residuals?

Back

Analyzing residuals helps to assess the fit of a regression model and identify any patterns that suggest the model may not be appropriate.