Determinants of pre-clinical phase. Concept of lead time ... The Pre-Clinical Phase (PCP) ... Prevalence of Pre-clinical disease. A critical determinant of the ...
BST is different from the mean body wt. of control cows. Ux Uy ... 20 cows randomized to BST (X) and control (Y). Measure wt. gain. Calculate mean wt. ...
1. Understand biological and measurement variation and its effects on precision and validity. ... Use kappa for dichotomous data or nominal polytomous data only. ...