part of a survey 16 college graduates and 19 non graduates were ked How many hours did you spend at your job last week The sults are shown in the stem and leaf display below Answer the estions that follow Number of hours at work Graduates Non graduates 7422 21 3 55320 3 0 3 3 5 6 7 8 982110 4 0124789 4 5259 Key 222 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 50s X AN Aa KI