BIOS 603

• Learning Objective 1

  1. Classify each of the following variables as binary, categorical without order, categorical with order or continuous. Some may be of more than one type depending upon how they were measured.
  

        1.  Age
        2.  Ethnic origin
        3.  Source of drinking water
        4.  Level of education
        5.  Height
        6.  Exposure to lead
        7.  Level of cholesterol
        8.  Political orientation
        9.  Political affiliation
       10.  Income
       11.  Occupation
       12.  Attitude toward statistics
  

  
  On line Help
  
  Answer
  
  

• Learning Objective 2

  Problems 2.1, 2.4 and 2.5 page 40
  
  Answer
  
  2. Find the mean, median and mode of these numbers:
  1,4,3,8,11,8,2,12,5,6
  
  
  
  Answer
  
  3. Find the mean, median and mode of this data.

          Score     Frequency
            1           4
            2           5
            3           7
            4           5
            5           4   
  

  
  
  Answer
  
  4. Find the mean, median and mode for this data.

       Score     Frequencey
         1            3
         2            6
         3            7
         4            3
         5            2
         6            2
         7            1
         8            1
  

  
  On Line Help
  
  Answer
  
  

• Learning Objective 3

  Compute the variance and standard deviation of duration for the seven people who were given antibiotics.
  Answer
  
  5. Compute variances and standard deviations for the on line problems for objective two. On Line Help
  
  Answer
  
  

• Learning Objective 4

  Construct a frequency distribution of the duration of stay data without grouping the data. Construct a second frequency distribution grouping the scores as 1-5, 6-10 ... Now compute the mean from the grouped data.
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  Answer
  
  

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