Deloitte Data Scientist interview questions

They sent me an data exercise set to complete some simple statistics one week prior to the interviewing with three people from Deloitte. There were a technical, behavioral, and a cultural interview; each one about 30 minutes long. I got an offer, but they reneged on it the following week. Was told that the specialist that reviewed the data set I submitted said I didn't include the mode (a useless statistic with this data set) on a box and whiskers plot, and that I did or didn't round numbers. Also, was told that technical interviewer said I had some shortcomings, which they didn't elaborate on.