Abstract
A recent national survey polled the viewpoints of public library directors and local government officials concerning the value of public library services and outlook for local tax support of public libraries over the next five years. The survey had multiple objectives: (1) to compare subgroups of smaller and larger libraries on key survey variables; (2) to obtain estimates within the library subgroups with adequate statistical precision; and (3) to make survey estimates for the total public library population. To determine how to best satisfy these competing requirements, the 1993 Federal-State Cooperative System (FSCS) universe listing was used to model the effect on survey accuracy of alternative sample designs. A compromise was chosen for the survey to insure that the sampling error for each type of estimate would be held within tolerable bounds. FSCS library-universe data are then used to model and compare the efficiency of six alternative sample designs for a national survey of 1,000 public libraries.
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