11. One hundred one-acre test plots are being used to assess the yield potential of a new variety of wheat genetically engineered by Washington State University.

The actual yield-per-acre observations on the test plots can be viewed as iid observations from some log-normal population, so that the statistical model for the experiment is given by fly; J..L, a2 ) = 12 )n/2 : nn . T{ a i=1 y,

[ In ] n X exp - 2a2 t;(lnYi - J..L)2 [VIO,ooIIYi)

for J..L E 1-00,00) and a > O.