Each of the following scatterplots shows a sequence of observations; the x-axis enumerates the sequence as in the example of the arrival of calls to the agent at the help desk in this chapter. For which cases does the Law of Large Numbers apply to probabilities based on these observations?

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(a)385 380 375 40 35 30 25 20 15 10 365 360 355 350 345 340 0 10 20 30 40 50 60 70 80 0 10 20 30 40 50 60 70 80 (c) 3.0 2.5 2.0 1.5 1.0 0.5 4 3 2 -0.5 0 10 20 30 40 50 60 70 80 0 10 20 30 40 50 60 70 80