ST512 Lab 7

Activities:

  • A power/sample size computation activity .
  • An R function powercomp.fcn to do the same problem, along with a nice graph.
  • Repeat the sample size computation described above using Lenth's applet .
  • Contrasts activity with data from exercise 8-24
  • A two-factor problem from an old exam involving blood pressure and diet: bp-lab7.sas
  • Helpful SAS programs:

  • wtloss-power.sas and diets.sas and diets-contrasts.sas and diets-nested.sas and
  • loblolly-1way.sas (2 x 2 ANOVA with inoculation and pit location as factors )
  • bp-lab7.sas (3 x 2 ANOVA with DIET and GENDER as factors)
  • Links

  • Two-factor (3 X 2) ANOVA applet
  • Lenth's power applets
  • SAS documentation for PROC GLIMMIX
  • Dataset from Ott & Longnecker, problem 8.24 ex8-24.txt