Q1. The marks of Hindi test conducted in a class of 40 students are as follows:
30, 54, 61, 83, 47, 93, 26, 78, 64, 55, 80, 56, 43, 67, 94,73, 48, 39, 84, 63, 54, 61,92, 43, 24, 84,72,36.
57, 90, 77, 69, 42, 56, 74, 81, 46, 34, 29, 40
Prepare a table with tally marks.
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(i) The class interval (40−49) has the highest frequency and the class interval (90−99) has the lowest frequency.
(ii) In the class interval (30−39), the lower limit is 30 − 0.5 = 29.5 and the upper limit is
39 + 0.5 = 39.5.
(iii) The range of the given distribution is 97− 32 = 65
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