Blood pressure A company held a blood pressure screening clinic for its employees. The results are summarized in the table below by age group and blood pressure level: a) Find the marginal distribution of blood pressure level. b) Find the conditional distribution of blood pressure level within each age group. c) Compare these distributions with a segmented bar graph. d) Write a brief description of the association between age and blood pressure among these employees. e) Does this prove that peoples blood pressure increases as they age? Explain

STAT 206 Chapter 5: Discrete Probability Distributions 5.1 Probability Distribution for a Discrete Variable RECALL: discrete variables have numerical values that arise from a counting process ● Probability distribution for a discrete variable: mutually exclusive list of all the possible numerical outcomes along with the probability of occurrence of each outcome ● Expected value of a random variable is the mean (μ) of its probability distribution ○ Expec ted value > E(x) = ΣxᵢP(xᵢ) ■ Σ = the sum ■ Xᵢ = a possible outcome ■ P(xᵢ) = probability of that outcome ■ The sub ‘i’ represents whatever value you’re working with