smartgirl777
Posts: 1
Joined: Sun Dec 02, 2007 3:31 pm

Taste-Test:How Many People Should I Test?

Postby smartgirl777 » Sun Dec 02, 2007 3:57 pm

How many people should I test in a taste-test of colas?

staryl13
Former Expert
Posts: 404
Joined: Tue Sep 18, 2007 3:27 pm
Occupation: Research Assistant

Postby staryl13 » Sun Dec 02, 2007 6:49 pm

Hi!
How many people you use as your sample size really depends on how much error you are willing to tolerate. Of course, the perfect experiment would try and eliminate all bias and outside variables with a huge sample size. You should try taking the largest sample possible for more accurate results. Here's a sample size calculator that will give you a rough idea of how large your sample size should be:
http://www.custominsight.com/articles/r ... ulator.asp
Also, this test has been done before, so try searching online for related information.
Good luck!
"There is a single light of science, and to brighten it anywhere is to brighten it everywhere." -Isaac Asimov

Louise
Former Expert
Posts: 921
Joined: Mon Jan 16, 2006 2:17 pm

Postby Louise » Sun Dec 02, 2007 6:55 pm

staryl13 wrote:Hi!
How many people you use as your sample size really depends on how much error you are willing to tolerate. Of course, the perfect experiment would try and eliminate all bias and outside variables with a huge sample size. You should try taking the largest sample possible for more accurate results. Here's a sample size calculator that will give you a rough idea of how large your sample size should be:
http://www.custominsight.com/articles/r ... ulator.asp
Also, this test has been done before, so try searching online for related information.
Good luck!


Just to add to Staryl13's good advice...
Sciencebuddies also has a page on this topic.
[url]
http://www.sciencebuddies.org/mentoring ... ants.shtml[/url]


Louise


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