Problem 13E
computer system administrator notices that computers running a particular operating system seem to freeze up more often as the installation of the operating system ages. She measures the time (in minutes) before freeze-up for seven computers one month after installation, and for nine computers seven months after installation. The results are as follows:
One month after install: |
207.4 |
233.1 |
215.9 |
|
235.1 |
225.6 |
244.4 |
|
245.3 |
|
|
Seven months after install: |
84.3 |
53.2 |
127.3 |
|
201.3 |
174.2 |
246.2 |
|
149.4 |
156.4 |
103.3 |
Find a 95% confidence interval for the mean difference in time to freeze-up between the first month and the seventh.
Review ● Outpatient facilities = patients can remain for fewer than 24 hours ○ Offices of clinicians ○ General and specialty clinics ○ Emergency departments ● Outcome measures = imply a focus on the result of health care, ranging from rates of infection to readmissions with complications ● Inpatient facilities = people can stay for more than 24 hours ● Medical malpractice = a body of state civil law designed to hold practitioners accountable to patients for the quality of health care ● Process measures = measurements of quality that focus on the procedures and formal processes that go into delivering care, from procedures to ensure credentialin
