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 to have at least 90% of technical employees with up-to-date certifications.The north-east 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 north-east division and 300 from the southern division and finds out that the number of employees with up-to-date certifications are 230 in the north-east division and 265 in the southern division.Assuming$\alpha$ = 0.01, the critical z value is ______.
A)−2.33
B)1.645
C)1.96
D)2.33
E)2.576

Question

Quizplus · Accepted Answer

The critical z value for a significance level (alpha) of 0.01 in a two-tailed test is ±2.33. This is because the area in each tail is 0.005, and the corresponding z value that cuts off the lower or upper 0.5% in a standard normal distribution is ±2.33.

Maxwell Cantor, VP of Human Resources of Asimov Aerospace Industries α\alphaα

Maxwell Cantor, VP of Human Resources of Asimov Aerospace Industries $\alpha$