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Unformatted text preview: The correct choice gets 4 points while one point is subtracted for every incorrect choice. The possible scores range from 10 to 40. A scatter plot is obtained for 200 students (all of whom attempt every one of the 10 questions) showing the number of questions a student got right versus their total score on the quiz. What is the correlation? 6. The exponential density with parameter has pdf f(x) given by: f(x) = ex :for x 0 with f(x) = 0 otherwise. (i) Work out the cdf F(x) = ( ) x f u du as a function of x and . (ii) Find the median of the distribution as a function of . (iii) Sketch the pdf and cdf and indicate what the median says on both....
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 Spring '11
 Haward

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