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In a suburban community, 30% of the households use Brand A toothpaste, 27% use Brand B, 25% use Brand C, and 18% use Brand D. In the four groups of households, the proportions of residents who learned about the brand they use through television advertising are as follows: Brand A, 0.10; Brand B, 0.05; Brand C, 0.20; Brand D, 0.15. In a household selected at random from the community, it is found that residents learned about the toothpaste through television advertising. What is the probability that the brand of toothpaste used in the household?
Limitations of ndex numbers
We have two applicants who are applying for a job. They both took the high school exit exam, but different ones. Shannon took the ACT and scored 26, Frank took the SAT scored 1350.
How to solve problems of index number fixed based method
1. A search engine site claims that, on average, one out of five visitors clicks on an ad. (a) If 8 users visit the site, what is the probability that at least three click on an a
z test problems
why are revenues an important number in financial statements?
difference of them for covering the following: 1.purpose of reporting 2.FORMAT OF INCOME STATEMENT
Ask Suppose that the expected number of phone calls that are handel by a switchboard in each second is 5.35. Assume that the distribution of the number of phone calls per second fo
According to Thomson Financial, through January 25, 2006, the majority of companies reporting profits had beaten estimates (BusinessWeek, February 6, 2006). A sample of 162 compani
In a certain lake a limnologist wishes to estimate the proportion of lake trout with lamprey scars. (a) How large of a random sample should be taken if the limnologist has no pr
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