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airrish
airrish
13.03.2020 • 
Mathematics

Typographical and spelling errors can be either "nonword errors" or "word errors." A nonword error is not a real word, as when "the" is typed as "teh." A word error is a real word, but not the right word, as when "lose" is typed as "loose." When undergraduates are asked to write a 250-word essay (without spell-checking), the number of nonword errors has the following distribution. Value of X 0 1 2 3 4 Probability 0.12 0.18 0.29 0.29 0.12 The number of word errors has this distribution. Errors 0 1 2 3 Probability 0.38 0.20 0.14 0.28 What are the mean numbers of nonword errors and word errors in an essay

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