There were some very strange findings that lead me to believe that either the samples were bad or the questions were bad (or maybe people were having fun at the interviewer’s expense).
Maybe I can believe that only 83% of MO keep kosher in the home (presumably people who are MO in their minds only). But 1% of ultra-orthodox have Christmas trees in their homes? 15% of ultra-orthodox attend non-Jewish religious services at least a few times a year whereas only 14% of reforms do? 13% of ultra-orthodox don’t believe that Israel was given to the Jews by G-d (here I suspect the question was confusing, leading UO’s to believe it was about the State.)