Moments and Continuous Distributions

Review and such

• reliability of median and mean
• Skewed distributions: when mean != median
• Go over roos model
• Dividing by N versus N-1
• Story about Nobelist asking questions
• Story about average savings by tax preparers
• New questions?

New Material

Extend stuff:

• drawing mode
• the clone tool

Statistics

• Moments and Parameters
• Mean (Expected Value) of a Distribution
  • Mean of a binomial
  • Mean of a binomial using Excel and sumproduct() and binomdist()
  • Mean of a Poisson
  • Linearity and mean of sums
• Variance and Standard Deviation
  • Linearity and variance of sums
  • Variance of the binomial
  • Variance of the Poisson
• Continuous Distributions
  • PDFs
  • Uniform Distribution
  • Triangular Distribution
  • Exponential Distribution
    • graphing it
    • memoryless property
    • relation to Poisson
• CDFs
  • uniform
  • triangular
  • exponential
• The Normal Distribution
  • PDF
  • CDF using Excel
  • CDF using Freund's tables
  • standard units

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