quiz2_09

quiz2_09 - Radioactive atoms are unstable because they have...

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Abel Rodriguez Applied Mathematics and Statistics AMS-007. Spring 2009 Name: Quiz 2 1. Guessing answers. Several biology students are unprepared for a surprise true/false test with 10 questions. and all of their answers are guesses. a ) (15 points) Find the mean and standard deviation for the number of correct answers for such students. b ) (35 points) Would it be unusual for a student to pass by guessing and getting at least 7 correct answers? Why or why not?
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Applied Math and Statistics Quiz 2 AMS-007. 2 2. Radioactive Decay.
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Unformatted text preview: Radioactive atoms are unstable because they have too much energy. When they release their extra energy, they are said to decay. When studying cesium 137, it is found that during the course of decay over 365 days, 1,000,000 radioactive atoms are reduced to 977,287 radioactive atoms. a ) (20 points) Find the mean number of radioactive atoms lost through decay in a day. b ) (30 points) Find the probability that on a given day, exactly 50 radioactive atoms decayed....
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This note was uploaded on 01/31/2010 for the course AMS 7 taught by Professor Prado,r during the Winter '08 term at UCSC.

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quiz2_09 - Radioactive atoms are unstable because they have...

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