Why is Mold Code 4 a larger percentage range than the others?

The Mold Code ranges are determined through cluster analysis of We Inspect’s home inspection data, which means that all the homes in any given Mold Code have a very similar amount of mold as each other. For Mold Code 4, the majority of homes fall in one range together, similar to the peak of a bell curve. The percentages mean that 50-90% of the total amount of sample data falls in that section, and all the homes in this range have very close to the same amount of mold. 

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