An education researcher claims that 57​% of college students work​ year-round. In a random sample of 500 college​ students, 285 say they work​ year-round. At α=0.05​, is there enough evidence to reject the​ researcher's claim? Complete parts​ (a) through​ (e) below. (a) Identify the claim and state H0 and Ha. (b) Find the critical value(s) and identify the rejection region(s) (c) Find the standardized test statistic z . (d) Decide whether to reject or fail to reject the null hypothesis and interpret the decision in the context of the original claim.

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