Below are the marks scored by 60 students in mathematics:
72,72,57,65,68,70,79,53,68,70,70,62,64,82,74,75,74,62,70,91,74,80,72,76,79,65,67,84,91,61,73,70,58,70,56,70,56,71,80,79,61,80,76,65,78,92,66,86,84,77,80,69,72,62,76,67,74,63,86,73,69
Use the above data with the given interval 50-54,55-59,60-64 and construct a cumulative frequency distibution table,draw a cumulative frequency curve,from your curve,determine the following:
Median
Inter quartile range
30th percentile.