IT 223 -- Practice Quiz Questions and Answers

The questions and answers for the practice quizzes
that have closed will be posted here.  The correct
answer is marked with an asterisk (*).

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1. Who was the first person to develop a theory of probability?
  *a. Blaise Pascal        b. Abraham De Moivre
   c. Karl Gauss           d. John Tukey

2. For a controlled experiment, the subjects are divided 
   into two groups: the group the receives the vaccine 
   and the group that receives the placebo. The group 
   that receives the vaccine is called the treatment 
   group.  What is the group that receives the placebo 
   called?  The __________ group.
   a. antidote    *b. control     c. primary     d. secondary

3. For the dataset
   378  120  793  608  278
   use the Tukey's Hinges method to compute the 3rd 
   quartile (Q3).
   a. 278      b. 378      c. 510      *d. 608   

4. For the dataset
   812   998  278  120  378  608  712  
   use the Tukey's Hinges method to compute the 1st 
   quartile (Q1).
   a. 278      *b. 328      c. 608      d. 762

5. A histogram is constructed using these bins
   [0, 300), [300, 600), [600, 800),  [800,1000] 
   and the sorted dataset
   120  278  378  600  712  789  800  998  
   How many observations are in the bin [600,800)? 
   a. 2      *b. 3      c. 4      d. 5

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