Choose the One Alternative That Best Completes the Statement or Answers

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 10 hours per week. In a random sample of 100 students, 61 studied more than 10 hours, 10 studied exactly 10 hours and the rest studied less than 10 hours. Find the test statistic to test the dean's hypothesis. Use $\alpha = 0.05$ .

A) $- 3.268$
B) $- 3.373$
C) $- 4.1$
D) $- 4.2$