MAT 241: Probability Practice, III
Exit Ticket
August 4, 2026
Exit Ticket Task
Navigate to our MAT241 Exit Ticket Form, answer the questions, and complete the task below.
Note. Today’s discussion is listed as 17. Additional Inference Practice, III
Task: A regional airline wants to know if a new online check-in system has changed the average time passengers spend at the check-in counter. Before the system was introduced, staff timed a random sample of 32 passengers and found a mean check-in time of 6.4 minutes with a standard deviation of 1.8 minutes. After introducing the system, staff timed a new random sample of 28 passengers and found a mean check-in time of 5.1 minutes with a standard deviation of 1.5 minutes. At the 5% significance level, does this sample provide evidence that the new system has reduced the average check-in time?
Identify which inferential procedure is appropriate here (one-sample or two-sample; mean or proportion; confidence interval or hypothesis test) and justify your choice. Then carry out the procedure.