STAT 652

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STAT 652
Lecture 10
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Examples
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Example

• 2 factors ADate of planting (early, late)
• BType of Fertilizers (None,K,NA,Aero)
• 2 X 48 Treatments
• Number of replications Number of experimental
  units on which each treatment is applied.
• If we use 4 replications then we need 8 x 432
  plots of land.

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Examples

• Haze buildup on prescription Lenses The haze
  that builds up on lenses for prescription
  eyeglasses is measured. Four different protective
  films are compared with 12 observation in each.
• Iron content Compare FE content () in four
  formation type of Iron (Carbonate, silicate,
  magnetite, hematite).

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Sum of squares
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Precambrian Iron formation

• 4 formation type Carbonate, silicate, magnetite,
  hematite
• Within each group measuring Y which is the FE
  content () in 4 formation types.