exam3fl08a - Exam3 Version1 STAT2610 Fall2008 Name_

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STAT 2610 Exam 3 Version 1 Fall  2008 Name___________________________________ Answer all 18 questions on the exam by selecting the  best  alternative.  On your scantron, bubble in your name (last name first)  and the version of the exam you are doing.   The next five questions are related and are based on the following information.  Happiness Income Not Happy Pretty Happy Very Happy Above Average 42 20 14 Average 50 24 18 Below Average 10 16 6 The contingency table above shows the results of a random sample of 200 Auburn families that was conducted to see whether their  state of happiness is related to their income level.    1.  1
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To test  whether  income and happiness are related among the population of Auburn families, which of the following should be the  alternative hypothesis?  a. 
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Happiness  depends on income level b. 
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Income and  happiness are independent   c. 
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Income levels  constitute the dependent variable d. 
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The income  categories are non-overlapping  e. 
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Happiness is a  quantitative variable    2. 
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Assuming  the family  income and state of happiness are independent, find an estimate for the expected cell count of an "average income family  that is pretty happy".    a. 
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46.9 
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b. 
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27.6 
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c. 
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22.8 
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d. 
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24 
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e.  2 2   C
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0.001
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b. 
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0.344 
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c. 
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2.447 
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d. 
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0.271 
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e.  0 .     S
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0.003 
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b. 
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0.271 
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c. 
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0.043 
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d. 
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This note was uploaded on 09/18/2011 for the course STAT 2610 taught by Professor Syvantek during the Spring '08 term at Auburn University.

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exam3fl08a - Exam3 Version1 STAT2610 Fall2008 Name_

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