10. A professor surveyed his statistics students about the amount of time they had spent on their work outside of class during the past week. The students gave the following answers 3 4 8 3 2 5 6 3 4 5 3 4 5 1 2 3 4 11. Calculate (a) the mode, (b) the median, and (c) the mean A, researcher looks at the unemployment rates for a number of census tracts within a city, The results were as follows: 5.6 6.8 12.4 23 4.1 22.4 8.8 92 7.2 9.7 74 52 56 Calculate (a) the mode, (b) the median, and (c) the mean 12. A school district tallied the number of students in each of its nine elementary schools. The schools enrolled the following number of students: 486 792 352 425 197 384 623 409 348 Calculate (a) the median, and (b) the mean