BUSA 3110 Name: KEY
Fall 2005
Last 10 point in-class
This assignment is closed book and closed neighbor; you may use one page of handwritten notes
and your calculator.
1. When a patient at a hospital pushes the call button, the patient (or the patient’s family)
expects a quick response. The nursing station on one unit of a large hospital decided to
investigate the number of times they were asked to respond to calls during a single shift.
Data were collected for the same shift over a 24 day period. The data and an associated Run
Chart are provided below.
Day Calls Day Calls
1 63 13 47
2 60 14 49
3 65 15 71
4 61 16 64
5 60 17 57
6 61 18 65
7 59 19 56
8 49 20 68
9 62 21 44
10 61 22 61
11 57 23 71
12 50 24 51
Total Calls = 1412
a) What type control chart would be appropriate to analyze the situation? Justify your answer.
They are counting and plotting “number of calls” but a single patient could call multiple
times (the issue is not if a patient calls or not). If the number of patients remains constant an
c chart would be appropriate.
b) Determine the center line and control limits for the chart. Show your work; then write your
answers in the space provided.
LCL = 35.822 833.58
24
1412
c==
CL = 58.833
UCL = 81.844 833.583833.58LimitsControl ±=
