Hey Tom, Thanks again for your input. I see what you mean about the rounding. I have rounded all zscores to accordingly. The only reason I have missing values for some of the zscores is due to some calculations do not apply to certain providers. For example, if looking at the total charged for DME supplies not all providers have billed those supplies. Joining data back will result in no match, which I substitute with a zero to avoid math errors. I used the round function to take care of all zscore rounding. Thanks again.
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