Scatter Plot Correlation AP Stat Review

Front

What is the response variable in a study predicting crop yield based on fertilizer application?

Back

The response variable is the yield of the crop.

Front

What does r² represent in a scatterplot?

Back

r² is called the Coefficient of Determination.

Front

In a study predicting soil washed away based on water flow rate, what is the explanatory variable?

Back

The explanatory variable is the rate of water flow.

Front

Back

The damage amount is 21.8 million dollars per acre, on average, along the coast.

Front

What percentage of variation in egg production can be accounted for by the linear regression on fish length if the output shows 69.7%?

Back

69.7% of the variation in egg production can be accounted for by the linear regression of egg production on fish length.

Front

Define 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 is the purpose of a regression line in a scatter plot?

Back

The regression line is used to predict the value of the response variable based on the explanatory variable.

Front

What does a positive correlation in a scatter plot indicate?

Back

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

Front

What does a negative correlation in a scatter plot indicate?

Back

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

Front

What is the formula for the slope of a regression line?

Back