Electronics Suppose that 46% of families living in a certain county own a computer and 18% own an HDTV. The Addition Rule might suggest, then, that 64% of families own either a computer or an HDTV. Whats wrong with that reasoning?

Important Terms Observational Study Data gathered by only witnessing individuals without guiding or stating an input on them. Designed Experiment Data gathered by an examiner on individuals then runs trials each to test one or more variables. Cofounding Variables existing variables within the student that affect the response Randomization randomly assigned themes to experiments Theoretical Method Divide the number of results in the experiment taken by total number results Empirical Method Calculating the relative frequency Relative Frequency X/n X number of successes n number of results Response and Explanatory Variables X= Response Variable = dependent Y= Explanatory Variable Independent Goal X is what causes the change in Y Probability