A key hospital outcome measure of clinical performance is length of stay (LOS) -

ID: 3352056 • Letter: A

Question

A key hospital outcome measure of clinical performance is length of stay (LOS) - that is, the number of days a patient is hospitalized. For patients at one hospital with acute myocardial infarction (heart attack), the length of stay over the past four years has consistently decreased. The hospital also has data for various treatment options such as the percentage of patients who received aspirin upon arrival and cardiac medication for left ventricular systolic dysfunction (LVSD). The data are as follows: Year Average LOS Aspirin on arrival LVSD medication 2007 4.29 days 95% 89% 2008 4.17 days 97% 94% 2009 4.23 days 98% 97% 2010 4.14 days 100% 98% Calculate descriptive statistics for the data. Do not round intermediate calculations. Round your answers to four decimal places. Descriptive Statistics: LOS, Aspirin, LVSD Standard Standard Variable Mean Error Deviation Minimum Median Maximum LOS Aspirin LVSD Calculate correlations for the data. Do not round intermediate calculations. Use a minus sig

Calculate descriptive statistics for the data. Do not round intermediate calculations. Round your answers to four decimal places.

Calculate correlations for the data. Do not round intermediate calculations. Use a minus sign for negative values, if any. Round your answers to three decimal places.

Choose the correct graph showing the LOS as a function of the Aspirin on arrival.

The correct graph is -Select-graph Agraph Bgraph Cgraph DItem 22 .

Choose the correct graph showing the LOS as a function of the LVSD.

The correct graph is -Select-graph Agraph Bgraph Cgraph DItem 23 .

n for negative values, if any. Round your answers to three decimal places. Correlations: LOS, Aspirin, LVSD LOS Aspirin Aspirin LVSD Choose the correct graph showing the LOS as a function of the Aspirin on arrival. The correct graph is . A. B. C. D. Choose the correct graph showing the LOS as a function of the LVSD. The correct graph is . A. B. C. D.

Year Average LOS Aspirin on arrival LVSD medication 2007 4.29 days 95% 89% 2008 4.17 days 97% 94% 2009 4.23 days 98% 97% 2010 4.14 days 100% 98%

Explanation / Answer

Descriptive Statistics: LOS, Aspirin, LVSD

Standard

Variable

Mean

Error

Deviation

Minimum

Median

Maximum

LOS

4.2075

0.0105

0.0210

4.14

4.20

4.29

Aspirin

97.75

1.0513

2.1015

97.5

100

LVSD

94.5

2.0208

4.0415

95.5

98 DONE