CBSE Class 10 Answered
Statistics
Asked by palaksophia | 27 Sep, 2009, 05:34: PM
Expert Answer
Class Class Mean Frequency Cumulative Frequency
0-10 5 7 7
10-20 15 14 21
20-30 25 13 34
30-40 35 12 46
40-50 45 20 66
50-60 55 11 77
60-70 65 15 92
70-80 75 8 100
The median class corresponds to cumulative frequency of 100/2 = 50 i.e 66, and is 40-50.
Median = 40 + ((100/2 - 46)/66)x10 = 40.61
Mode = 40 + [(20 - 12)/(2x20 - 12 - 11)]x10 = 44.71
Regards,
Team,
TopperLearning.
Answered by | 28 Sep, 2009, 10:08: PM
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