Final answer:
In statistics, the sample statistic represents specific values obtained from a sample, in this case, the mean wait time of 150 visitors to the emergency room.
Step-by-step explanation:
In this question, we are given the mean wait time of the emergency room as 25 minutes. The hospital checks the wait times of 150 randomly selected visitors and finds a mean wait time of 28 minutes. Based on this information, we have the following:
Sample statistic: Mean wait time of 150 visitors - 28 minutes
So, the answer is: Sample statistic: 150 visitors - 25 minutes - 28 minutes - Unknown
The statement indicates a sample statistic and the associated sample size:
150 visitors, a mean wait time of 28 minutes, and a claimed population mean wait time of 25 minutes.
The sample statistic is the mean wait time of the 150 randomly selected visitors, which is 28 minutes in this case.