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Question
- i)The following data gives the life span, in hours, of 50 flash light batteries.
73, 72, 58, 102, 84, 76, 82, 100, 70, 72, 81, 95, 105, 101, 63, 85, 82, 90, 54, 75, 92, 75, 84, 62, 85, 80, 52, 87, 91, 85, 80, 104, 106, 72, 57, 103, 78, 79, 91, 70, 108, 97, 88, 73, 67, 101, 96, 84, 53, 86
For the above data, prepare a grouped frequency distribution by inclusive ( non-over lapping) method taking 10 as the magnitude of class intervals
- i)The following data gives the life span, in hours, of 50 flash light batteries.
73, 72, 58, 102, 84, 76, 82, 100, 70, 72, 81, 95, 105, 101, 63, 85, 82, 90, 54, 75, 92, 75, 84, 62, 85, 80, 52, 87, 91, 85, 80, 104, 106, 72, 57, 103, 78, 79, 91, 70, 108, 97, 88, 73, 67, 101, 96, 84, 53, 86
For the above data, prepare a grouped frequency distribution by inclusive ( non-over lapping) method taking 10 as the magnitude of class intervals
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Solution
According to the given data, we can form the frequency distribution as follows:
(Note: The numbers which are repeated are counted as one.)
Class interval frequency
50 – 60 5
61 – 70 4
71 – 80 9
81 – 90 9
91 – 100 5
101 – 110 7
According to the given data, we can form the frequency distribution as follows:
(Note: The numbers which are repeated are counted as one.)
Class interval frequency
50 – 60 5
61 – 70 4
71 – 80 9
81 – 90 9
91 – 100 5
101 – 110 7
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