The Teacher's Corner: A Simplified Method of Solving Simple and Multiple Regression Equations

An introductory statistics course that emphasized consistency of student requirements and diversity of instructors was taught at the University of New Hampshire. Over a four-year period, 24 instructors from 12 departments taught this course. Student requirements remained essentially the same from term to term or instructor to instructor because exams were prepared by sampling question frames that were largely independent of instructors. Student performance appeared to be buffered against instructor variation through a combination of visible question frames, abundant tutorial help, and exams that could be retaken.     

The Teacher's Corner: Interpolation in F-Tables

A lemma is given which simplifies the derivation of maximum likelihood estimates of the covariance matrix in the multivariate normal case.     

The Teacher's Corner: A Visual Derivation of Some Elementary Discrete Distributions

As a member of a clinical investigative team developing a protocol for a clinical trial, the statistician has broad responsibilities for ensuring the scientific integrity of the product. To prepare for this role, the statistician must study and learn in detail the clinical subject matter and must be prepared, if necessary, to teach the statistical principles of clinical trials to collaborators. This article discusses various issues that arise in the design of a clinical trial and how the statistician can participate in their resolution.