# Question: A contract engineer at DuPont Corp studied the rate at

A contract engineer at DuPont Corp. studied the rate at which a spilled volatile liquid will spread across a surface (Chemical Engineering Progress, Jan. 2005). Suppose that 50 gallons of methanol spills onto a level surface outdoors. The engineer uses derived empirical formulas (assuming a state of turbulence-free convection) to calculate the mass (in pounds) of the spill after a period ranging from 0 to 60 minutes. The calculated mass values are given in the table below and saved in the LIQUIDSPILL file. Is there evidence to indicate that the mass of the spill tends to diminish as time increases?

## Answer to relevant Questions

Construct a relative frequency histogram for the data summarized in the following table: The Condor (May 1995) published a study of competition for nest holes among collared flycatchers, a bird species. The authors collected the data for the study by periodically inspecting nest boxes located on the island of ...Clinical observations suggest that specifically language-impaired (SLI) children have great difficulty with the proper use of pronouns. This phenomenon was investigated and reported in the Journal of Communication Disorders ...Two fair dice are tossed, and the up face on each die is recorded. a. List the 36 sample points contained in the sample space. b. Assign probabilities to the sample points. c. Find the probability of observing each of the ...A pair of fair dice is tossed. Define the following events: A: {You will roll a 7 (i.e., the sum of the numbers of dots on the upper faces of the two dice is equal to 7).} B: {At least one of the two dice is showing a 4.} ...Post your question