Basic Applied Statistics 200
Solutions to Practice Midterm 1

  1.  
    1. taking CoQ10 or not
    2. (ii)
    3. migraines...
    4. (ii)
    5. (i)
  2.  
    1. (ii)
    2. (ii)
    3. unethical
    4. (a) and (b) are closed
  3.  
    1. mean plus or minus 2 sds: 600 to 1000 g
    2. mean minus 3 sds: 500 g
    3. z=(740-800/100=-.6
    4. a bit light
  4.  
    1. (ii) 150 AD (centered around higher numbers)
    2. (ii)150 AD (box is taller)
    3. (i) 5 cm (the other options are too large)
    4. (v) both symmetric
    5. (i)
  5.  
    1. 29/1200=.024
    2. 50/3000=.017
    3. (i)
    4. .017(1800)=30
    5. (ii)
    6. (i)
  6.  
    1. (iv)
    2. (iv)
  7.  
    1. (i)
    2. (i)
  8.  
    1. size
    2. 15.9 (the slope)
    3. (vi) .83 (positive square root of .687)
    4. -141+15.9(40)=495 thousand dollars
    5. 523-495=+28 thousand dollars
    6. S=59.62
    7. (ii)
    8. (i) increase


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