A company has reduced its staffing level in its customer service department. They believe that with the new call center system upgrade many of the customers will have their questions answered without talking to an agent. Thus, the expectation is that average time spent by customers on the phone will be the same after this downsizing. They plan to initiate a study to be sure. What is the null hypothesis?

A company has reduced its staffing level in its customer service department. They believe that with the new call center system upgrade many of the customers will have their questions answered without talking to an agent. Thus, the expectation is that average time spent by customers on the phone will be the same after this downsizing. They plan to initiate a study to be sure. What is the null hypothesis?

μ₁: average time before downsizing

μ₂: average time after downsizing