A box has three coins. One has two heads, one has two tails, and the other is a fair coin with one head and one tail. A coin is chosen at random, is flipped, and comes up heads. a. What is the probability that the coin chosen is the two-headed coin? b. What is the probability that if it is thrown another time it will come up heads? c. Answer part (a) again, supposing that the coin is thrown a second time and comes up heads again.

Chapter 1 Section 1 Variable-a characteristic/attribute that can assume different values Data- values that the variables can assume Population- all subjects undergoing a study Parameter- measure obtained from the population data Uses Greek Letters to categorize Sample- a group selected from the population, to make the study more concentrated Statistic- a measure that is obtained from the sample data Uses the Alphabet to categorize Descriptive Statistics- the collection, organization as well as summarization of data Basically sums up what you’ve collected and makes it easier to understand Inferential Statistics- generalizes a known sample data to the unknown population data