2. The following results were obtained in a class assignment:
Score 3 4 5 6 7 9 10
Number of Students 2 4 3 10 20 23 17 5
For all of the results from the whole class draw a bar graph to illustrate the distribution and then calculate:
(a) the mean
(b) the standard deviation (You do not need to show working if you used a statistical calculator or computer.)
(c) the median
(d) the mode
(e) the range

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