a. Show that E(Xi?? 2 X???) 5 ai, so that Xi?? 2 X??? is anunbiased estimator for ai (in the fixed effects model).b. With gij 5 Xij? 2 Xi?? 2 X?j? 1 X???, show that gij is anunbiased estimator for gij (in the fixed effectsmodel).

STAT 206 Chapter 6: Normal Distribution and Other Continuous Distributions 6.2 The Normal Distribution ● Normal Distribution: ost common continuous distribution used in statistics ○ Importance: ■ Numerous continuous variables common in business have distributions that closely resemble the...