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Unformatted text preview: 4a) Add the individual %s for the Times and the Herald. Then, you need to subtract off what is in common between the 2. However, you need to subtract this amount twice since it is in both and we do not want it at all. You may have only subtracted this once which is understandable. If you only subtracted it once, that would be the answer for the Times or the Herald. However, the question was for the Times or the Herald but not both. The alternative is to just add up the following for items from the Venn diagram: ‐only the Times ‐only the Herald ‐the Times and the Examiner but not all 3 ‐the Herald and the Examiner but not all 3 The numbers should be .248, .159, .103, and .056 respectively for the total of .566. 4b) The easiest way here is to use the Venn diagram. The problem says only 1 of the 3 papers, so you cannot include any overlap. It must be 1 and only 1. So, you add up the following 3 things: ‐only the Times ‐only the Herald ‐only the Examiner The numbers should be .248, .159, and .139 respectively. This gives a total of .546. 4e) This is very similar to part b. It is 2 and only 2. So this time we are interested in the overlap with the exception of the very middle. We must add up the following: ‐The Times and the Herald but not the Examiner ‐The Times and the Examiner but not the Herald ‐The Herald and the Examiner but not the Times These numbers are .071, .103, and .056 respectively. This gives us the total of 23. ...
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This note was uploaded on 02/26/2012 for the course STAT 225 taught by Professor Martin during the Fall '08 term at Purdue UniversityWest Lafayette.
 Fall '08
 MARTIN
 Probability

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