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Unformatted text preview: STT200 Section________ Graded HA # 4 Name_______________________, Summer B, 2008 Please write or mark the section number (1 pt. if missing) Number of points for each problem is in brackets [ ]. SHOW YOUR WORK ! 1) A biology professor responds to some student questions by email. The probability model below describes the number of emails that the professor may receive from students during a day. a. [2] How many emails should the professor expect to receive each day? …………………………….. b. [2] What is the standard deviation? ……………………………………………………………………… c. [2] If it takes the professor an average of ten minutes to respond to each email, how much time should the professor expect to spend responding to student emails each day? ………………………………….. 2) The American Veterinary Association claims that the annual cost of medical care for dogs averages $100 with a standard deviation of $30, and for cats averages $120 with a standard deviation of $35....
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 Summer '08
 dikong
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