Determine whether the claim represents the null hypothesis or the alternative hypothesis. If a hypothesis test is performed, how should you interpret...

Determine whether the claim represents the null hypothesis or the alternative hypothesis.  If a hypothesis test is performed, how should you interpret a decision that (a) rejects the null hypothesis?  (b) fails to reject the null hypothesis?

A government agency claims that more than 75% of full-time workers earn over $538 per week.