Following data gives marks of 10 students in Mathematics (X) and statistics (Y): (30, 10), (12, 22), (18, 19), (20, 25), (13, 34), (28, 29), (14, 18), (27, 24), (16, 16), (15, 20) How many students scored more than 20 marks in statistics ?
1) 4
2)5
3)6
4)7
5)10
6) none of the above
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Answer:The frequency distribution table for the given marks can be drawn as:
(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.
Explanation:
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