Probability Example Questions
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1. A box contains four tickets, one marked with a star and the other three blank. One draw is made from this box at random.
a. What does "at random" mean?
b. What is the random variable in this experiment?
c. Write the probability model corresponding to this random variable. Explain your answer. Also verify that it is a valid probability model.
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Solution Summary
This solution defines the term, "at random", determines the random variable and writes a probability model corresponding to the random variable.
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1. Random can mean several things in statistics. In this case, the "at random" means that there is no predictable pattern in picking a certain card in a single draw. Here, each time, all cards have the same probability of being ...
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