Human Variability
One size fits all doesn't work because we all differ in: 
  • Age 
  • Gender
  • Occupation - People subconsciously select their jobs based on their body structure
  • Racial/Ethnic Differences
  • Generational
  • Transient Diurnal - variations in body proportions during the day(ex gravity on the spine)
We are not proportional!
Human variability between body parts. 
Human Variability
  • For normal distributions:
    % Value = mean + F x Standard Deviation
  • X = M + F*x + ADJUSTMENT

X = % of population less than or equal to you
M = Mean
F = Multiplication factor corresponding to the required percentile
s = standard deviation
Percentile System
80% means that 80% of people are less than you (below or AT)
  • Central Tendency: Mean, median, mode
  • Dispersion: standard dev, max, min, range
   Login to remove ads X
Feedback | How-To