Choose the one alternative that best completes the statement or answers the question.
-A government agency believes that the median hourly wages for retail store workers in the central U.S. is $\$ 6.90$. In a random sample of 100 workers, 68 were paid less than $\$ 6.90,10$ were paid $\$ 6.90$, and the rest more than $\$$ 6.90. Find the test statistic $z$ to test the government's hypothesis. Use $\alpha = 0.05$.
A) $- 4.743$
B) -3.912
C) $- 3.187$
D) $- 2.386$

Question

Quizplus · Accepted Answer

The correct answer is A because the test statistic $z$ is calculated as $(68 - 50) / \sqrt{100 * 0.5 * 0.5} = -4.743$.

Choose the One Alternative That Best Completes the Statement or Answers