A coin is flipped ten times. What is the probability that the first three flips are all HEADS given that an equal number of HEADS and TAILS are flipped? How does this conditional probability compare with the simple probability that the first three flips are HEADS?

Part II Descriptive Statistics CHAPTER 2: Organizing Data Section 2.1 Variables and Data • Variables: characteristic that varies from one person or thing to another • Data: Value of a variable. Variable Qualitative variables: Non-numerically Quantitative variables: Numerically valued values variable. variable. Ex: sex, eye color, names Ex: weight, height, number of siblings Discrete variable: Quantitative Continuous variable: Quantitative variable variable whose possible values can whose possible values form some interval be listed. of numbers. Counted or listed Obtained by measuring Ex: number of siblings Ex: weight, height Data Values of a variable Qualitative Data: value of qualitative Quantitative Data: value of quantitative variable. variable. Discrete Data: value of discrete Continuous Data: value of continues variable. variable. Observation: each individual piece of data Data set: collection of all observations for a particular variable N