15A-Test+6-Final-2007 - NAME I.D FINAL PROBABILITY AND...

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NAME: _______________________________ I.D.: _________________________________ FINAL PROBABILITY AND STATISTICS, ECON 15A DECEMBER 14, 2007 1. In a certain town, 20% of the people belong to Club A. The probability of belonging to Club B given that you don’t belong to Club A is 30%. The probability of not belonging to Club B given that you belong to Club A is 90%. What is the probability of belonging to club A given that you belong to club B? You must show work. 2. There are three red balls, a blue ball, two yellow balls and four green balls. What is the probability of drawing five balls (with replacement) and getting exactly 3 red balls? You must show work. 3. What would be the height of this graph if the y-axis were a density scale? (I’m asking what the value would be at the top of the graph.) 4. Draw a box-and-whisker graph for the following data: 20, 21, 22, 23, 24, 26, 30, 34, 50, 60. Be sure and put values on the x-axis (please draw the plot horizontally), and make sure it is neat and clear (and please use the entire width of the page). 5. The binomial distribution is determined by two parameters. What are they?
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