Let me make it easier for you: consider the school you went to, the market you work in (I assume NYC), your grades, and the time period you entered the market, adjust for external factors (Are you the super personal/quiet type). Now, do you think you got as many offers as a comparable classmate?
Using the formula that you set out, I think that if anything I out-performed my comparable classmates while wearing a kippah to every interview. I think that when interviewers are seeing 20-30 candidates a day, it can be hard to remember exactly who was whom. Having a distinguishing feature makes it easier for them to remember the impression you made- good or bad. I even had an interview where I talked at length about being shomer shabbat and the discipline, work ethic, and sense of self-identity that these restrictions have fostered. (I got a callback but turned it down).
I'm not saying that this is definitely the case with everyone, but you have to be very careful about the self-affirmation bias. If someone hears even a hint that it may not be their qualifications that lost them the job, they are quick to jump on it. So even if the kippa is playing some small role, I think it is very easy for people to play up that role, rather than be introspective about how their personality or life experiences may have impacted them.