Final answer:
Supplementary schedules, such as data related to the breakdown of key financial figures by operating segment, are helpful to financial statement analysts.
Step-by-step explanation:
True. Supplementary schedules, such as those that breakdown key financial figures by operating segment, provide additional information to financial statement analysts. These schedules help analysts gain a deeper understanding of a company's performance by providing insights into its various business activities or divisions. By examining the breakdown of key financial figures, analysts can assess the performance and profitability of each segment and make more informed investment decisions.