As part of a survey 19 college graduates and 18 non graduates were asked How many hours did you spend at your job last week The results are shown in the stem and leaf display below Answer the questions that follow Number of hours at work Graduates Non graduates 61 2167 888422 3 0 23 55689 986 64 32 4 1699 98535068 Key 21 1 2 1 21 a What were the ranges for the two groups Graduates Non graduates b Which group had the higher median number of hours Graduates ONon graduates The medians were the same c Which group had more responses in the 20s Graduates ONon graduates OEach had the same X