CompSci 6, Fall 2004, Lab 6: Randomness & Slots

Prelab exercise

• Read the Slots assignment
   
• Currently, the SlotsTest class has a few simple test cases. You should add more. See the code below taken from main.

  // Create tester SlotsTest test = new SlotsTest(new SlotMachine( new int[] { 0, 1, 1, 1, 1, 2, 4 }, new int[] { 0, 0, 2, 10 }, new int[] { 0, 1, 2, 3, 4, 5, 6 } )); test.testCalculateWinnings(new int[] { 0, 1, 1 }, 1, 2); // TODO: add more test cases for testCalculateWinnings test.testSpin(new int[] { 1, 2, 3 }, new int[] { 1, 2, 3 }); // TODO: add more test cases for testSpin

  You will add the following:

  1. Add at least 1 test case each for testCalculateWinnings and testSpin
  2. Create another SlotsTest object with different parameters and create test cases for the new object.

• Create a README and answer the following questions:
  • Based on the linked description of how slot machines work, how should you react to a winning streak? Consider a situation where you have won on three consecutive pulls, should you:
    • Increase your bet
    • Decrease your bet
    • Neither increase nor decrease your bet

    Explain your reasoning.

  • The testSpinStatistics method in the SlotsTest class is designed to test SlotMachine's spin method. How would you design an experiment to determine if a particular slot machine is fair, that is: do the symbols appear as frequently as one would expect given the machine parameters?
     
• Submit README and SlotsTest.java as lab06_prelab using Eclipse

Lab exercise

• Discuss prelabs
  • SlotsTest Examples
  • Example Answers to First Question
  • Example Answers to Second Question
  • In-Lab exercises