Empirical Probabilities (use of relative frequencies) A worker on an assembly line was observed, and the observer recorded the number of serious mistakes per day over a 1000 day period. The frequencies are given in the following table. 1 360 3 88 14 15 X=0 302 2 218 errors 6 or more Total frequency 25 2 1,000 a) Estimate the probability of zero errors for the day. b) Estimate the probability of four or more errors. c) Estimate the probability of at least one error. d) Estimate the probability of at most three errors

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