(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

http://img687.imageshack.us/img687/7963/screenshot20120102at185.png [Broken]

2. Relevant equations

3. The attempt at a solution

I understand how to compute a Chi-squared test, but I'm a bit confused about the wording of parts a) and c). Could someone possibly simplify it for me?

Thanks a lot.

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# Statistics: Null hypothesis/chi-squared question.

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