A Section 4.3 f Li www.webassign.net/web/Student/Assignment-Responses/last?dep=

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A Section 4.3 f Li www.webassign.net/web/Student/Assignment-Responses/last?dep= 13038881 :: Apps WebAssign Heinle Learning g Bookshelf Onlin D understanding-… , Section 4.4 xG Home | Chegg.com evinhicksema 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 0 123 4 Probability 0.11 0.21 0.28 0.28 0.12 The number of word errors has this distribution Errors 0 1 23 Probability 0.37 0.29 0.15 0.19 What are the mean numbers of nonword errors and word errors in an essay? 2. + -13 points MIntroStat6 4.E.075 My Notes Ask Your Teacher How do rented housing units differ from units occupied by their owners? The table below gives the distributions of the number of rooms for owner-occupied units and renter-occupied units in a certain city Rooms1 2 4 Owned0.003 0.002 0.023 0.104 0.210 Rented 0.008 0.027 0.288 0.363 0.163 Rooms6 Owned0.2240.197 0.149 0.053 0.035 8 9 10 Rented 0.093 0.039 0.013 0.003 0.003 Find the mean number of rooms for owner-occupied housing. (Round your answer to three decimal places.) room Find the mean number of rooms for renter-occupied housing. (Round your answer to three decimal places.) roomS Renter-occupied housing typically has fewer rooms, and its distribution is more skewed than the owner-occupied housing distribution. How do the means reflect the differences between the distributions? O The means agree with the observation that renter-owned housing typically has fewer rooms The means disagree with the observation that renter-owned housing typically has fewer rooms Hula Grl.jpg product-64687 jpg Show all downloads... x Ask me anything 5:37 PM 2/29/2016

Explanation / Answer

1.

For nonword errors, consider:

For word errors, consider:

hence,

u(nonword) = 2.09 [ANSWER]
u(word) = 1.16 [ANSWER]

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x P(x) x P(x) 0 0.11 0 1 0.21 0.21 2 0.28 0.56 3 0.28 0.84 4 0.12 0.48

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