In a recent issue of the IEEE Spectrum, 84 engineering conferences were announced. Four conferences lasted two days. Thirty-six lasted three days. Eighteen lasted four days. Nineteen lasted five days. Four lasted six days. One lasted seven days. One lasted eight days. One lasted nine days. Let X = the length (in days) of an engineering conference. Part (a) Organize the data in a chart. (Round your answers to four decimal places.) X Frequency Relative Frequency Cumulative Relative Frequency 2 5 6 7 8 9 + Part (b) + Part (c) + Part (d) + Part (e) + Part (f) + Part (9). + Part (h) Part (i) Find the mode. days Part () If you were planning an engineering conference, which would you choose as the length of the conference: mean, median, or mode? Explain why you made that choice. O I would choose the mean because it represents the average length of a conference. I would choose the median because all the conferences lasted from 2 to 9 days, so 4 days would represent a value close to the center of the data. I would choose the mode because almost half of the conferences lasted 3 days. I would choose the median because half of the conferences lasted fewer than 4 days and half of them lasted longer than 4 days