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. (i) 2 categorical variables: use bar graph
   2. (i) compare percentages
3.  
   1. (ii)
   2. (ii)
   3. unethical
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=
   2. 50/3000=.017
   3. (i).017(1800)=30
   4. (ii)
   5. (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. 59.62
   7. (ii)
   8. (i) increase

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