What is middle class in one place is poverty level in another and upper middle class is most assuredly MUCH higher than those figures!
Those are national numbers. State household income medians differ somewhat, but not by multiples. At the top end, 80% of median New Jersey households make less than 141.4K. The equivalent percentile for Mississippi is $81K. Medians for NJ and MS are $71.6K and $39K respectively. The poverty line is typically defined as being somewhere in the teens, percentile-wise. The 20th percentile for NJ is $28.3K. MS's median number is obviously higher than $28.3K, let alone NJ's actual poverty line somewhere in NJ's teen percentiles.
Then these figures are MEANINGLESS and USELESS...as I stated !