Spelling errors. Spell-checking software catches nonword errors that result ina string
Chapter 0, Problem 10.43(choose chapter or problem)
Spelling errors. Spell-checking software catches nonword errors that result ina string of letters that is not a word, as when the is typed as teh. Whenundergraduates are asked to type a 250-word essay (without spell-checking), thenumber X of nonword errors has the following distribution:Value of X 01234Probability 0.1 0.2 0.3 0.3 0.1(a) Is the random variable X discrete or continuous? Why?(b) Write the event at least one nonword error in terms of X. What is theprobability of this event? (c) Describe the event X 2 in words. What is its probability? What is theprobability that X < 2?
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