Monday

April 21, 2014

April 21, 2014

Posted by **Gavin** on Monday, January 21, 2013 at 9:02pm.

Identify the type of observational study as either Cross-sectional or retrospective

(just a reminder, Cross-sectional is data measured at one point in time, retrospective is data collected from the past)

1.) An economist collects data by interviewing people who won the lottery between the years 1995 and 2000

My answer: Retrospective

My reasoning: the data is in the past

I am confused though because if you think farther into it, the data is collected at the present (interviewing people who have won)it's just a group of people between certain years. so it could bed cross-sectional. your input would be very helpful. thank you for your time!

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