ABSTRACT
Suppose we are estimating a vector mean. Consider for instance the base‐ ball player example, Section 1.6. Let the vector (H, W, A) denote the height, weight and age of a player. Say we are interested in the population mean vector μ = ( E H , E W , E A ) $$ \mu = (EH,~EW,~EA) $$ https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315119588/73361af7-9536-4efc-8314-e11ced5010dd/content/math8_1.tif"/>
