Basic Applied Statistics 200
Solutions to Practice Midterm 1

  1.  
    1. (iii)
    2. (i),(ii),(iv)
    3. none
    4. (iii)
    5. (i)
    6. (ii)
  2.  
    1. taking CoQ10 or not
    2. (ii)
    3. migraines...
    4. (ii)
    5. (i)
  3. (b)
  4.  
    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
  5.  
    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)
  6.  
    1. 29/1200=.024
    2. 50/3000=.017
    3. (i)
    4. .017(1800)=30
    5. (ii)
    6. (i)
  7.  
    1. (iv)
    2. (iv)
  8.  
    1. (i)
    2. (i)
  9.  
    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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