Suppose the length of a chapter of a Harry Potter book, inwords, is approximately normally distributed. Chapters are known tohave an average length of 4580 words, with a standard deviation of120 words. About what percent of Harry Potter chapters have between4460 and 4700 words? About what percent of Harry Potter chaptershave more than 4820 words? About what percent of Harry Potterchapters have more than 4220 words?

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To answer the questions we can use the zscore formula for a normal distribution z X where X is the v... View the full answer