I pulled a few interesting screenshots of the data from my full post on this topic here. If you're a Katy Realtor, you really should check it out, and see all of the additional statistical data it contains surrounding days on market in Katy, Texas.
Katy Median Days on Market By House Price Point
Median DOM - Katy & KatyISD vs. Katy & Another ISD
As Katy real estate agents know, not every home with a Katy postal address is zoned to Katy ISD. Check out how being zoned to different school districts in the same town affects DOM.
Katy vs. Surrounding Areas by Median DOM
You'll find the full data and information sources used for these charts here.