In a horse race, the odds in favor of the first horse winning in an 8-horse race are 2 to 5. The odds against the second horse winning are 7 to 3. What is the probability that one of these horses will win?

Stats 10 Week 2 Notes Discussion Chapter 1: Data Most data is categorical, which is easier for people to understand and interpret Any numerical data can be made categorical. Numerical Continuous age and weight; not an integer Discrete number of people in classroom; integer Separating the two only matters when numbers are tiny. Categorical data Ordered class year, company structure Un-ordered eye color, gender The more statistics the more the model matters. Population v. Sample Whole point of statistics is to get a good sample to represent population. Observation v. Experiment ‐ retrospective v. prospective Observation doesn't influence anything. Association / correlation but no causation. Experiments influence things to control for confounding var