Mary D. Sammel
Biostatistician
Mary Dupuis Sammel is a biostatistician, who works as a professor in the Department of Biostatistics and Epidemiology in the Perelman School of Medicine at the University of Pennsylvania. As well as doing research on theoretical statistics[JRSS] and reproductive health,[JAMA][OG][AGP]
she also raises guide dogs and has published research on their upbringing.[PNAS]
Education and career
Sammel graduated from the University of Michigan in 1986 with a bachelor's degree in statistics and completed a master's degree in applied statistics in 1988 at the same university. She did her doctoral studies at the Harvard School of Public Health, completing a Sc.D. in biostatistics in 1995.
Work with guide dogs
Sammel and her family have been active at fostering future guide dogs, from infancy through puppyhood until they are ready to go on to more intensive training with The Seeing Eye as a guide dog.
With a student, Emily Bray, Sammel studied the effects of dogs' mothers' behavior on the dogs. Their work showed that dogs with overly-attentive mothers tended to be less effective as guide dogs,
and less successful at completing guide dog training.[PNAS]
Recognition
In 2015, Sammel was elected as a Fellow of the American Statistical Association.
“Mary D. Sammel” enters the record as biostatistician. Crown Archives preserves that source wording while asking what Mary, Sammel and Biostatistician can confirm, complicate or overturn.
Why this record matters
“Mary D. Sammel” is worth following because a concise public description often conceals a longer documentary argument. Here, Mary, Sammel and Biostatistician provides the most credible route into that argument.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Jan 31, 2026. The linked authority identifier is Q43038269. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1986, 1988, 1995 and 2015.
A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Mary D. Sammel”, its source revision and the description used here.
- Expand the search: follow Mary D. Sammel primary sources, Mary D. Sammel archive and Mary research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Mary D. Sammel”?
- Which cited source is closest to the event, object or claim?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “Mary D. Sammel” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.