The average wait time for patients at a dentist’s office is just over 22 minutes

Question

The average wait time for patients at a dentist’s office is just over 22 minutes. To address long waiting times, some offices are using wait-tracking systems to notify patients of expected wait times. Patients can adjust their arrival time to minimize the in-office wait time. The data in PatientWaits files how sample wait times (in minutes) of patients at offices that do not have wait-tracking and sample of patients at offices with wait-tracking.

What are the mean and median wait times for

Patients at offices with wait-tracking?

Patients at offices without wait-tracking?

What are the variance and standard deviation for

Patients at offices with wait-tracking?

Patients at offices without wait-tracking?

Construct a 95% confidence interval estimate of the true population mean waiting times for

Patients at offices with wait-tracking?

Patients at offices without wait-tracking?

Using the results from above (a) – (c), do offices with wait-tracking system have shorter patient wait times that offices without wait-tracking system. Explain

Patient wait files

Without Wait-Tracking System With Wait-Tracking System 24 31 67 11 17 14 20 18 31 12 44 37 12 9 23 13 16 12 37 15

Explanation / Answer

Use Microsoft Data Analysis Tool Pack

What are the mean and median wait times for

Patients at offices with wait-tracking?

Ans Mean: 16.5
    Median: n/2=5

Patients at offices without wait-tracking?

Ans:Mean: 29.1
    Median: n/2=5

What are the variance and standard deviation for

Patients at offices with wait-tracking?

Ans: Variance:69.6111
     std deviaton:8.343327

Patients at offices without wait-tracking?

Ans: Variance:275.6556
     std deviaton:16.60288

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