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Stat 230 Midterm (1)A+++
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Circle the best answer for each question

 

Use the following data for questions 1 through 4: 5,12,6,8,5,6,7,5,12,4.

 

  1. The median is
  1. 5
  1. 6
  1. 7
  2. 8
  3. None of the above

 

  1. The mode is
  1. 5
  1. 6
  2. 7
  3. 8
  4. None of the above

 

  1. The mean is
  1. 5
  2. 6
  1. 7
  1. 8
  2. None of the above

 

  1. The 75th percentile is
  1. 5
  2. 6
  3. 7
  1. 8
  1. None of the above    

 

Use the following data for questions 5 through 9: 3,5,12,3,2.

 

  1. The variance is
  1. 80
  2. 4.062
  3. 13.2
  1. 16.5
  1. None of the above

 

  1. The standard deviation is
  1. 8.994
  1. 4.062
  1. 13.2
  2. 16.5
  3. None of the above

 

  1. The coefficient of variation is
  1. 72.66%
  1. 81.24%
  1. 264%
  2. 330%
  3. None of the above

 

  1. The range is
  1. 1
  2. 2
  1. 10
  1. 12
  2. None of the above

 

  1. The interquartile range is
  1. 1
  1. 2
  1. 10
  2. 12
  3. None of the above

 

 

 

 

10. If A and B are independent events with P(A) = 0.4 and P(B) = 0.6, then   

      P(A l B) =

  1. 0.76
  2. 1.00
  3. 0.24
  4. 0.2
  1. None of the above      = 0.4

 

  1.  If A and B are independent events with P(A) = 0.2 and P(B) = 0.6, then

P(A U B) =

  1. 0.62
  2. 0.12
  3. 0.60
  1. 0.68
  1. None of the above

 

  1.  If A and B are independent events with P(A) = 0.05 and P(B) = 0.65,

then  P(A l B) =

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