Comparing this to part (a), where the z-score for the 10th patient without a wait-tracking system was approximately 0.476, we can see that the 37-minute wait time is more unusual (further from the mean) in the context of the wait-tracking system than in the context of no wait-tracking system.

• For offices without a wait-tracking system, the z-scores range from approximately -1.03 to +2.28, and there are no z-scores beyond the typical outlier threshold of +3 or -3 standard deviations.

• For offices with a wait-tracking system, the z-scores range from approximately -0.88 to +2.13, and similarly, there are no z-scores beyond the typical outlier threshold of +3 or -3 standard deviations.

Therefore, based on the z-scores, neither data set contains any outliers.

In comparison:

• The 6th patient had a significantly longer wait time than the 10th patient.

• The 6th patient waited for almost 15 minutes more than the average, while the 10th patient waited for almost 13 minutes less than the average.

• Generally, outliers in z-scores are considered to be values greater than 3 or less than -3. In the table you provided, all z-scores are within this range. The highest z-score is 2.133 for the 6th patient with the tracking system, and the lowest z-score is -1.030 for the 12th patient without the tracking system.

• However, it's important to consider the context and sample size when interpreting z-scores. The table only shows data for 10 patients, which is a relatively small sample. With a larger sample, there might be outliers that wouldn't be apparent in this data.