2009 Health Care Statistics
Statistics help(random sampling)?
In a large-scale hospital study, the study investigator randomly sampled 36 hospitals from 68 hospitals in the country. Within each of the sampled hospitals, 500 patients who were hospitalized during July 2008 – June 2009 were randomly chosen. Their medical records were retrieved and whether they died while hospitalized was noted. It
was found that on average, hospitals in which health care information is gathered and stored on computers had a lower patient death rate than hospitals that still rely on the ‘paper’ system (using paper forms and handwritten notes).
a)Identify the sample?
b) Name the sampling method employed in selecting the patients.?
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For a) is sample the patients?
or do i have to say 500 patients in 36 hospitals.
For b) I am not sure between Stratified Random Sampling vs Multistage sample or is it neither of them?
use the chi square test for that :
http://en.wikipedia.org/wiki/Pearson%27s_chi-square_test
Where is the Health Care System Headed?