110_lec01AND02_Sample_Surveys

110_lec01AND02_Sample_Surveys - Statistics DATA INSIGHT...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Statistics DATA INSIGHT CONCLUSIONS
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Anecdote vs Data Anecdote Striking story Sticks in our minds Focuses on one or a few incidents Data Collection of information Systematically describes an overall picture
Background image of page 2
Anecdote vs Data Book Example: Research Question: Does living near power line cause leukemia in children? Data: National Cancer Institute spent 5 yrs and $5 million gathering data Result: No connection between between leukemia and exposure to magnetic fields of the kind produced by power lines. Report: Editorial reported ‘It is time to stop wasting our research resources.’ Anecdote: TV News Report Report: Investigation with articulate mother whose child has leukemia and who happens to live near a power line. Which story is more appealing? How many incidents is it based on?
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Where Data Come From Single most important fact about any statistical study! The first thing you ask when someone throws a number at you. A little vocabulary Individuals:objects described by a data set. People, households, animals, potato chips Variable: characteristic of an individual Numerical: height, number of children under 5, calories, heart-rate Non-numerical: sex, religion, color, crispness, religion
Background image of page 4
How Can We Collect Data? Observational Study describes some group or situation. Example – sample surveys. Observe individuals and measure variables of
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 21

110_lec01AND02_Sample_Surveys - Statistics DATA INSIGHT...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online