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Unformatted text preview: required – expressions are sufficient for (a)). (b) What assumption(s) underlies your solution to (a)? Comment briefly on how likely it is that your assumption(s) is valid. (10 marks) 3. In a slalom ski race 20% of competitors fail to finish (due to crashing or going off course), independently of other competitors. Calculate the probability (a) in a race with 8 competitors, exactly 2 fail to finish. (b) The 8 th competitor in a race is the second one who fails to finish (c) The 8 th competitor in a race is the second one who fails to finish, given that 2 of these 8 competitors fail to finish. Statistics 230, Fall 2009 Midterm Test Name: _______________________ Time: 70 minutes ID #: _______________________ Instructor/Section: M. LaCroix (1, 2, 5) __; C. Springer (3) __ ; S. Khan (4) __ PLEASE IND ICATE YOUR INSTRUCTOR/SECTION ABOVE....
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 Spring '10
 WILKIE
 Envelope, probabil ity, f loors

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