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Found in: Page 132

### Statistics For Business And Economics

Book edition 13th
Author(s) James T. McClave, P. George Benson, Terry Sincich
Pages 888 pages
ISBN 9780134506593

# Spreading rate of spilled liquid. A contract engineer atDuPont Corp. studied the rate at which a spilled volatileliquid will spread across a surface (Chemical EngineeringProgress, January 2005). Assume 50 gallons of methanolspills onto a level surface outdoors. The engineer used derived empirical formulas (assuming a state of turbulent-freeconvection) to calculate the mass (in pounds) of the spillafter a period of time ranging from 0 to 60 minutes. The calculatedmass values are given in the table. Is there evidenceto indicate that the mass of the spill tends to diminish astime increases? Support your answer with a scatterplot.

There is evidence that with time mass of the spill diminishes.

See the step by step solution

## Interpreting whether the mass of the spill decreases with an increase in time

Looking at the data in the table, we can say that as time increases, the mass of the spill reduces.

But to make it easier to identify, we will create a scatterplot of the data from the table. We will plot the time on the x-axis and the mass on the y-axis.

The graph is given below:

Looking at the downward slope of the graph makes it easier to identify a negative correlation between the time and mass of the spill.

The downward sloping graph is evidence that the mass of the spill diminishes as time increases.