Stats

• risk of event


  risk of event-

  number of trials that the event happens in

  ----------------------------------------

  number of trials
• Index number


  index number-

  price

  ------- x 100

  base year price
• weighted index numbers


  current weighted mean price

  ---------------------------- x 100

  base year weighted mean price
• km mj
• binomial expansion


  $(p+q)^n$
• seasonal variation at a point

  actual value - trend value
• standardised score


  score-mean

  ------------

  standard deviation
• weighted mean


  E (value x weight)

  ----------------

  E weights
• relative risk for group

  risk for those in group

  --------------------

  risk for those not in group
• predicted value


  trend line value + estimated seasonal mean
• normal distribution


  N(u,o~)
• frequency


  frequency= frequency density x class width
• mean of binomial expansion


  mean of binomial expansion

  n x p
• chain base index numbers


  chain base index numbers-

  price

  ----------- x 100

  last years price
• estimated mean seasonal variation

  mean of the seasonal variations for that season