A researcher was counting the number of sick days taken by an employee, I, and summarized their sample results below: # of sick days Frequency fx fa2 N 4 8 16 3 6 18 54 4 10 40 160 11 55 275 Total Total Total Total 14 31 121 505 What is the mean, @? Round to 1 decimal place. Number What is the median? Round to 1 decimal place. Number What is the mode? Number What is the sample standard deviation, s? Round to 1 decimal place. Number