67.8
56.3
13. The following data gives weights of 30 persons (in kg):
45.7
50.3 49.8 54.3 60.5 62.3
50.1 45.0 72.4
59.4 47.5 64.5
48.8
62.3 69.4 64.2 70.0
60.3
66.8 44.6
64.7 71.3 59.9 56.3 66.6 52.7
(i) Construct a frequency distribution such that the last class is 72 - 76.
(ii) State the upper class limit of first three class intervals.
(iii) State the maximum weight that can be included in the fourth class interval.
(iv) State the class mark of each of the classes.
(CBSE SP 2011
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