Tues Sep 23 - Statistics Lecture Notes

• questions ?

• Discuss homework.
  • survey height histograms in Excel (and Mathematica) - a recipe
  • discuss histogram
  • Powerball? Megabucks?

• Test
  • mean from given numbers
  • standard deviation, differences between sigma and S
  • z-score from a given value
  • bar graphs, histograms, interpreting them
  • percentile ranks
  • probability distribution from histogram; other basic definitions

• Start discussion binomial distribution (chap 5), time allowing
  • "bi" - system with 2 values
  • p = probability of "success"
  • q = 1- p = probablity of "failure"
  • n = number of trials
  • S = total number of successes
  • example on pg 129: lung cancer patients
  • C(n,m) = number of ways a subset of m things can be taken from a group of n
    = "binomial coefficient"
    = n!/( m! (n-m)! )
    = number in Pascal's triangle
  • some examples from end of chap 5