The Importance of Data
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MORE DECKS TO EXPLORE
PRESENTATION OUTLINE
DRUNKEN FRUIT FLIES
Photo by NASA's Marshall Space Flight Center
EMILY ROSA, YOUNGEST TO PUBLISH IN JAMA
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SIMPLE RANDOM SAMPLE
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“RANDOM” IS WAY HARDER THAN IT SEEMS
Photo by Patrick Fore
MOST POPULATIONS WE’RE INTERESTED IN ARE COMPLEX
Photo by Ezra Comeau-Jeffrey
REPRESENTATIVENESS IS THE KEY TO THE COOL STATS
Photo by JD Hancock
GETTING A GOOD SAMPLE IS FREAKIN’ HARD
Photo by S. F. Pitman
Bad statistics generally aren’t a matter of messing up the math (computers!), it’s messing up the sample
Photo by Fríða mín
MINNEAPOLIS DOMESTIC VIOLENCE EXPERIMENT
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2) COMPARE GROUPS
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CONTROL GROUP & TREATMENT GROUP
NEED TO BE SIMILAR ON EVERYTHING EXCEPT THE TREATMENT
Photo by Carbon Arc
SIMPLE IN THE PHYSICAL & BIOLOGICAL SCIENCES
Photo by Sharon Pittaway
WE CAN’T REALLY FORCE PEOPLE, EXPERIMENT
Photo by Katya Austin
MAJOR LONGITUDINAL STUDIES
Photo by Erwan Hesry
We can’t really speak to causation in cross-sectional data.
Photo by >=> Mãhi Teshneh
“WE CAN’T ALWAYS HAVE THE FERRARI”
Photo by Mohammed Nairooz
SELECTION BIAS
Photo by Agence Olloweb
LITERARY DIGEST POLL, 1936
Photo by FDR Presidential Library & Museum
NON-RANDOM SORTING INTO GROUPS: PROSTATE CANCER
Photo by Gabriel 'Briel' Rocha
SELF-SELECTION BIAS: VOLUNTEER INTO TREATMENT
Photo by Thomas Hawk
REMEMBER, UNUSUAL THINGS HAPPEN SOMETIMES
Photo by Arnold Leow
CLIMATE CHANGE RESEARCH
Photo by woodleywonderworks
RECALL BIAS
Photo by Wade Morgen
MEMORY: DIET & CANCER STUDY, 1993
Photo by Chris Yarzab
EX: CONSERVATIVISM AT OLDER AGES
Photo by Cristian Newman
EX: MANAGED MUTUAL FUNDS
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VITAMINS & PURPLE PAJAMAS
Photo by Kerri Lee Smith
EX: TOOTHBRUSHING & MORTALITY
Photo by begemot_dn
