Bn.

a customer service department implements new training for employees to help lower their average call times. The manager would like to determine the average call time before training differs from the average call time after training. Which measure should this manager use to decide if the training was effective?

A. Variance compared to the standard deviation

B. Median compare to the mode

C. T-statistic compared to the t-critical value

D. Z-score compared to the P-valu

Choose correct answer and give explanation 100+ wor-ds mandatory

e