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A hospital is interested in improving its processes as it is losing money on bowel surgery patients reimbursed through Medicare. A stratification approach was employed to achieve "risk adjustment" and the quality improveme nt team analyzed data on patients undergoing elective surgery, who were 65 years of age or older, and were having a single procedure. The selected measure is the post-operative length of stay (LOS). The table below shows LOS for a randomly selected patient each month for 30 months. A new pathway was introduced after the 18th month.
Month
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
LOS
19
16
17
18
20
21
22
23
24
25
26
27
28
29
30
a. Construct appropriate control charts for before and after introduction of the new pathway. Discuss process stability and the results.
b. Can you conclude that the new pathway has caused a significant reduction in the average length of stay? Test using α = 0.05.
A chance sample of 50 families revealed an average or median of $112,000 and a standard deviation of $40,000. What is the standard error of the average or median?
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Write the regression equation approximately. Computed the coefficient of determination(r 2 ).
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Write up your results by using scientifically recognized form.
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Probability histogran curve of percentage of (P)z
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