Question: 12.7 Proofreading. Return to the proofreading setting of Exercise 12.5. (a) If X is the number of word errors missed, what is the distribution of

12.7 Proofreading. Return to the proofreading setting of Exercise 12.5.

(a) If X is the number of word errors missed, what is the distribution of XI If Y is the number of word errors caught, what is the distribution of Y?

(b) What is the mean number of errors caught? What is the mean number of errors missed? The mean counts of successes and of failures always add to n, the number of observations.

(c) What is the standard deviatiori of the number of errors caught? What is the standard deviation of the number of errors missed? The standard deviations of the count of successes and the count of failures are always the same.

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