Maxwell Cantor, VP of human resources of Asimov Aerospace
Industries Inc., is reviewing the technical certifications of
employees in different divisions of the company. His goal is having
90% of technical employees with up-to-date certifications. The
Northeast division typically has maintained higher rates of
up-to-date certifications than the Southern division. He selects a
random sample of 250 employees from the Northeast division and 300
from the Southern division and finds out that the number of
employees with up-to-date certifications are 230 in the Northeast
division and 265 in the Southern division. Assuming a = 0.01, the
critical z value is ______.
−2.33
1.645
1.96
2.33
2.576
