Excel final exam - Math 1107-Elementary Statistics Exam...

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Math 1107--Elementary Statistics Name This test should be an individual effort. DO NOT work with anyone else on this test!!! Please make sure to record your answers for problems 1-12 on the answer sheet. Test is due by Tuesday, May 5, 2010!! 1. A survey found that 89% of a random sample of 1024 American adults approved of cloning endangered animals. Find the margin of error for this survey if we want 90% confidence in our estimate of the percent of American adults who approve of cloning endangered animals. a. 1.92% b. 1.61% c. 16.50% d. 4.85% e. 5.78% 2. A survey of 300 union members in New York State reveals that 112 favor the Republican candidate for governor. Construct a 98% confidence interval for the percentage of all New York State union members who favor the Republican candidate. a. (31.9%, 42.8%) b. (30.1%, 44.5%) c. (26.7%, 47.9%) d. (30.8%, 43.5%) e. (17.8%, 56.8%) 3. When 293 college students are randomly selected and surveyed, it is found that 114 own a car. Construct a 99% confidence interval for the percentage of all college students who own a car. a. (34.2%, 43.6%) b. (32.3%, 45.5%)
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c. (33.3%, 44.5%) d. (31.7%, 46.3%) e. (17.4%, 60.4%) 4. A manufacturer wishes to estimate the proportion of washing machines leaving the factory that is defective. How large a sample should she check in order to be 90% confident that the true proportion is estimated to within 1.5%? a. 3,007 b. 7,368 c. 6,012 d. 4,269 e. Not enough information is given. 5.
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This note was uploaded on 06/28/2011 for the course MATH 1107 taught by Professor Staff during the Spring '08 term at Fort Valley State University .

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Excel final exam - Math 1107-Elementary Statistics Exam...

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