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$1.00 2. For each observational study, is it retrospective, prospective, or cross-sectional? Explain your answer.

  • From Mathematics: Statistics
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  • Due on Jun. 11, 2012
  • Asked on Jun 01, 2012 at 3:18:52PM
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mit2008
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Q:

2. For each observational study, is it retrospective, prospective, or cross-sectional? Explain your answer.

a. A researcher plans to obtain data by following those in cancer remission since June of 2012.

b. An animal advocate is trying to raise money for a local shelter. On a given day she uses a computer to randomly select 500 phone numbers in her area, calls each, and asks the person who answers if he or she would be willing to make a donation to the shelter.

c. A demographer tabulates the number of immigrants to theU.S.by year from 1970 through 2005.

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RE: statistics question
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  • Posted on Jun. 02, 2012 at 10:07:07AM
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MCoban
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Preview: ... ted since June 2012. b: It would be a cross-sectional study because it is a collection of data at a specific point ...
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