15. Given below are the ages of 45 people in a colony.
33 8 7 25 31 26 5 50 25 48 56 36
33 28 22 15 62 59 16 14 19 24 35
26 9 12 46 15 42 63 32 5 22 11
42 23 52 48 62 10 24 43 51 37 48
Construct grouped frequency distribution for the given data with 6 class intervals.
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Answer:
In given data minimum value is 5 and maximum value is 63
⇒ Range =63−5=58
⇒ Number of class interval =6 class interval (Average)
⇒ Length of the class interval =
6
58
=9.6≈10
Class−interval Frequency
0−9 5
10−19 8
20−29 10
30−39 7
40−49 7
50−59 5
60−69 3
Total 45
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