TechNova Inc. employees frequently use screens for their tasks, and a small fraction of them experience eye strain as a consequence. These issues can be alleviated, and future occurrences avoided, by adjusting individual workstation setups. Since making these adjustments for all employees would incur significant costs, TechNova's strategy is to make changes only when an employee reports eye strain. Nevertheless, these adjustments would improve the efficiency of all TechNova employees. The information provided, if true, could best support which of the following conclusions?