Basic Applied Statistics 200
Solutions to Practice Midterm 1

1.  
   1. (iii)
   2. (i), (ii), (iv)
   3. none are quantitative
   4. (iii)
   5. (i)
   6. (ii)
2.  
   1. taking CoQ10 or not
   2. (ii)
   3. migraines (other descriptions, like "headaches", are possible)
   4. (ii)
   5. (i)
3.  
   1. (iv)
   2. (iv)
4.  
   1. (i)
   2. (i)
5. (b)
6.  
   1. (i)
   2. (i)
   3. (ii)
   4. (ii)
   5. (iv)
7.  
   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. (ii) a bit light
8.  
   1. 29/1200=0.024
   2. 50/3000=0.017
   3. (i)
   4. 0.017(1800)=30
   5. (ii)
   6. (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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