【简答题】The manager of a department store is investigating the relation between the number of salespersons in duty during a week, X, and the value of merchandise lost (shrinkage) per week, Y in $'000. The in...
【简答题】Last month the manager of a jewelry shop (珠宝店) received a letter. As he was very busy then, the letter lay on his desk till tea-time. He opened it and a 10-pound note(票) fell out onto the desk. Within...