The following table shows the results of a survey of authors by a fictitious publishing company. Established Authors 20 53 Total 16 73 Consider the following subsets of the set S of all authors represented in the table: C, the set of successful authors; U, the set of unsuccessful authors; N, the set of new authors; and E, the set of established authors. HINT [See Example 3.] (Round your answers to two decimal places.) Successful Unsuccessful New Authors 1 15 What percentage of established authors are successful? % What percentage of successful authors are established? % Total 21 68 89

3899 you're a data analyst for an insurance company. You want to make sure that your employer is not over-paying for car repairs. To investigate this, you bring 38 different cars to two different garages, Bubba's Hubcap Heaven and Repair, and Merle's Motor Shop. Some of the cars need lots of repairs. Some of the cars need very few. By taking each car to both shops, we can directly compare the two sets of prices.  Before running your analysis, be sure to look at the data file and verify that each car requires a different amount of repairs, and that prices in one shop are correlated with prices at the other shop. That is, they're in the same ballpark. The question is whether one tends to charge more, on average, than the other. Your task is to use Excel to test the research hypothesis that prices are different in the two shops; the null hypothesis is that prices are equal between the two shops. You test at the alpha = 0.01 significance level. What do you conclude? Are prices the same?…

q8a A person’s educational attainment and age group was collected by the U.S. Census Bureau in 1984 to see if age group and educational attainment are related.  The counts in thousands are in following table ("Education by age," 2013): Table: Educational Attainment and Age Group   Education Age Group Row Total 25-34 35-44 45-54 55-64 >64 Did not complete HS 5416 5030 5777 7606 13746 37575 Competed HS 16431 1855 9435 8795 7558 44074 College 1-3 years 8555 5576 3124 2524 2503 22282 College 4 or more years 9771 7596 3904 3109 2483 26863 Column Total 40173 20057 22240 22034 26290 130794 Do the data show that educational attainment and age are independent?  Test at the 5% level.   (i)  Which of the following statements correctly defines the null hypothesis HO? A.  level of educational attainment is not independent of age  B.  level of educational attainment is independent of age C.…

Need 99% interval for all five countries.