A shop owner tries to predict heater sales by displaying the sales of hot chocolate and heaters on the following scatterplot.Does the scatterplot of hot chocolate sales and heater sales indicate that it is appropriate to calculate the correlation?
A)No: the relation must be linear.
B)Yes: the relation is strong.
C)Yes: the direction is positive.
D)Yes: the relation is linear.
E)Yes: the two variables are quantitative.

Question

A shop owner tries to predict heater sales by displaying the sales of hot chocolate and heaters on the following scatterplot.Does the scatterplot of hot chocolate sales and heater sales indicate that it is appropriate to calculate the correlation? 
A)No: the relation must be linear. 
B)Yes: the relation is strong. 
C)Yes: the direction is positive. 
D)Yes: the relation is linear. 
E)Yes: the two variables are quantitative.

Quizplus · Accepted Answer

The scatterplot of hot chocolate sales and heater sales indicates a linear relation between the two variables. As such, it is appropriate to calculate the correlation coefficient to determine the strength and direction of the relationship between the two variables. The correlation coefficient measures the linear association between two quantitative variables, and this is exactly what we have in this scenario. Therefore, the best choice is D.

A Shop Owner Tries to Predict Heater Sales by Displaying