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HHS's surveys and data systems include ARF, BRFSS, HCUP, HRS, MEPS, MCBS, NCS, NHANES, NHCS, NHIS, NIS, NSDUH, NSFG, NVSS, OASIS, SLAITS and YRBSS.
Health research and data are available from HHS's divisions, including ACF, ACL, AHRQ, CDC, CMS, FDA, Forum on Child & Family Statistics, HRSA, HSMP, IHS, NCHWA, NCHS, NIH, and SAMHSA.
Statistics and data both refer to numeric summaries of many observations. Typically statistics focus on the central tendency of a single measure, such as an average, often with minimal attention to spread, such as the range. Means graphed over time show trends.
A data set systematically collects individual, raw measurements in a spreadsheet or table. A data set can be analyzed to yield central tendency and spread for an individual measure, trends over time, and relationships between different measures.