Chi-square Test?

From: Luigi (xxx_at_tin.it)
Date: 08/03/04 

Date: Tue, 03 Aug 2004 10:18:15 GMT

Hallo to everyone,

assuming I asked for preference between two products (A and B) and I got the
following:

Base: 200 respondents

A preferred 30%
B Preferred 40%
No preference 20%
Noticed difference but no preference 10%

What kind of test should I use for testing such preference?
How to use Chi-square Test?

Thanks

Luigi

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