Choose the One Alternative That Best Completes the Statement or Answers

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
-A college dean believes that the median hours spent studying by full time students is at least 12 hours per week. In a random sample of 100 students, 65 studied more than 12 hours, 10 studied exactly 12 hours and the rest studied less than 12 hours. Find the critical value to test the dean's hypothesis. Use $\alpha = 0.05$ .

A) $- 1.645$
B) $- 1.96$
C) $- 2.33$
D) $- 2.575$