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MIDTERM 1 KEY

MIDTERM 1 KEY - Name TA Math 10C Midterm Exam 1 Sec No PID...

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Name: PID: TA: Sec. No: Sec. Time: Math 10C . Midterm Exam 1 January 30, 2008 Turn off and put away your cell phone. You may use one page of notes, but no calculators, books or other assistance. Read each question carefully, and answer each question completely. Show all of your work; no credit will be given for unsupported answers. Write your solutions clearly and legibly; no credit will be given for illegible solutions. If any question is not clear, ask for clarification. # Points Score 1 14 2 8 3 11 4 7 Σ 40

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1. Consider a population of individuals with a flu. Suppose t is the number of days since the onset of the disease. The density function p ( t ) of the time needed to recover is given by a45 1 2 3 4 5 6 7 1 4 1 10 t (a) (5 pts) Sketch and label the corresponding cumulative distribution function. Solution: For x < 0, P ( x ) = 0. Between x = 0 and x = 3: P ( x ) is a straight line through (0 , 0) and (3 , 3 10 ). Between x = 3 and x = 5: P ( x ) is a straight line through (3 , 3 10 ) and (5 , 8 10 ).
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MIDTERM 1 KEY - Name TA Math 10C Midterm Exam 1 Sec No PID...

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