A contract may condition the performance of a party upon the approval of a third party

The seniority status of a new first-line supervisor

a. is a problem when such supervisory posts are filled from outside the plant. b. is best handled by a contract that is silent on the issue. c. can be lost when the employee is hired from the bargaining unit. d. a and c.

If the test statistic for the Wilcoxon signed-rank test is greater than the critical value for the Wilcoxon signed-rank test, the null hypothesis is rejected

Indicate whether the statement is true or false