Math
posted by Anonymous .
The following data set gives the difference between the winning and?
losing scores in 50 randomly observed high school basketball games: 2, 12, 1, 2, 12, 5, 14, 2, 45, 9, 1, 8, 18, 28, 9, 4, 30, 16, 4, 12, 8, 13, 20, 9, 17, 13, 49, 17, 13, 4, 14, 2, 12, 29, 8, 9, 11, 4, 6, 22, 4, 20, 23, 9, 14, 11, 8, 8, 2, 8.
A) Make a frequency table detailing the occurrence of each score difference.
B) Find the relative frequency of each score difference observed.
C) Make a stemandleaf plot of the data from this experiment.
D) Develop appropriate intervals and make a histogram for this data
I've made the frequency table if someone can just check it and then I don't know where to go from there?
a) Frequency table:
( value, frequency)
(1,2)
(2,5)
(4,5)
(5,1)
(6,1)
(8,6)
(9,5)
(11,2)
(12,4)
(13,3)
(14,3)
(16,1)
(17,2)
(18,1)
(20,2)
(22,1)
(23,1)
(28,1)
(29,1)
(30,1)
(45,1)
(49,1)

I also have C. Just need help with B and D.