Stat 112: Residuals and JMP IN

• Administrivia:
  • Office hours: Nuria Wednesday 11-12, Michael Thursday 11-12.

• outcome = fit + residual
  • equivalently: pattern + noise
  • science is interested in the fit/pattern
  • Statistics studies the resudual/noise
  • the residuals shouldn't have any pattern to them
  • draw ideal, curvature, heteroskadasticity

• JMP IN of metobolic_rate.jmp
  • 2.10, plot, positive/negative association, males vs females?
  • 2.19 Color the plot. Symbol the plot. What is your guess of correlation for men and women? Mean for men and women? Kgs/lbs change the correlation?
  • 2.49 Y = a + bX. change to lbs, what is the slope? Mean of men?
  • Find the forecast for your weight. (atheletes = 90% lean, male average 80%, female 70%.)

• Residuals of metobolic data
  • Use fit model. Then use $ to save the residuals.
  • Look for patterns--men vs. women (click on men in the histogram of men and all men will flash in the residual plot.)
  • Look at histogram of residuals

Last modified: Tue Feb 1 09:53:41 EST 2000