Spreading rate of spilled liquid. Refer to the Chemical Engineering Progress (Jan. 2005) study of the rate at which a spilled volatile liquid will spread across a surface, Exercise 11.35

(p. 630). Is there sufficient evidence (at a = .05) to indicate that the mass of the spill tends to diminish linearly as elapsed time increases? If so, give an interval estimate

(with 95% confidence) of the decrease in spill mass for each minute of elapsed time.