The following is the frequency distribution for the speeds of a sample of automobiles traveling on an interstate highway. Speed (mph) Frequency 5054 3 5559 4 6064 6 6569 10 7074 8 7579 4 35 The mean is _____.Exhibit 2-3 The number of sick days taken (per month) by 200 factory workers is summarized below. Number of Days Frequency 0 5 120 6 10 65 11 15 14 16 20 1 The number of workers who took at most 10 sick days per month is _____