Figure 3.5: Nonresponse has been increasingly steadily, even in high-quality expensive surveys (National Research Council 2013; B. D. Meyer, Mok, and Sullivan 2015).
चित्रा 3.5: गैर-प्रवृत्ति बढ्दै गएको छ, उच्च-गुणस्तर महंगी सर्वेक्षणमा पनि (National Research Council 2013; BD Meyer, Mok, and Sullivan 2015) ।