Problem 2-21

Suppose that the average waiting time for a patient at a physician's office is just over 29 minutes. In order to address the issue of long patient wait times, some physician's offices are using wait-tracking systems to notify patients of expected wait times. Patients can adjust their arrival times based on this information and spend less time in waiting rooms. The following data show wait times (minutes) for a sample of patients at offices that do not have a wait-tracking system and wait times for a sample of patients at offices with a wait-tracking system.

Without Wait- Tracking System	With Wait-Tracking System
23	31
62	10
15	13
21	17
32	11
45	35
10	10
26	2
16	11
35	16

(a)	Considering only officeswithouta wait tracking system, what is thez-score for the tenth patient in the sample (wait time = 35 minutes)?
If required, round your intermediate calculations and final answer to two decimal places.
z-score =
(b)	Considering only officeswitha wait tracking system, what is thez-score for the sixth patient in the sample (wait time = 35 minutes)?
If required, round your intermediate calculations and final answer to two decimal places.
z-score =
How does thisz-score compare with thez-score you calculated for part (a)?
The input in the box below will not be graded, but may be reviewed and considered by your instructor.
(c)	Based onz-scores, do the data for offices without a wait tracking system contain any outliers?
- Select your answer -YesNoItem 4
Based onz-scores, do the data for offices with a wait tracking system contain any outliers?
- Select your answer -YesNo