Statistical Methods - Text Mining Techniques for Healthcare Provider Quality Determination - page 80

Figure 6. Sample mean for sample size=5 and 1000 replicates

lInear regressIon

Suppose there are twenty five ICD9 conditions that are included in the linear regession to determine the
relationship of patient severity to variables such as length of stay or charges (or cost). Then weights are
assigned to the indicator functions. The contribution of these conditions to the linear regression is the
sum of the weights of the conditions that are identified with a patient,

a XX +++ a ... a X

12 22 25 25

Figure 7. Sample mean for sample size=30 and 1000 replicates