Time-Zone Caper: Suspect Is Arrested In Testing Scheme
George Kobayashi, 45-year-old California resident, is arrested and charged with helping students cheat on standardized exams for graduate school; reportedly took advantage of time-zone changes, coded pencils and expert test-takers who telephoned answers to West Coast where tests were being given on same day; ran American Test Center, which advertised unique method of preparing students for graduate school admissions tests for $6,000; Federal complaint alleges that shortly before tests were given, takers were provided with answers to multiple-choice questions written in code on sides of pencils, several of which students reportedly carried into exam; says students were also told what essay questions were (M)