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7. Statistics
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Q1 of 48 Page 126

What is the mode of 19, 19, 15, 20, 25, 15, 20, 15?

Mode is the most frequently occurring observation. On arranging above data in ascending order, we get: 15, 15, 15, 19, 19, 20, 20, 25. Hence, 15 is the mode.

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The mean of five numbers is 80, out of which mean of 4 numbers is 46, find the 5th number :

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Mean of 100 observations is 40. The 9th observation is 30. If this is replaced by70 keeping all other observations same, find the new mean.

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What is the median of 7, 10, 7, 5, 9, 10?

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From following table, what is the cumulative frequency of less than type for the class 30-40?

Questions · 48
7. Statistics
1 2 1 1 2 3 4 5 6 7 8 9 10 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 1 1 1 1 1 1 1 1 1 2 3 4 5 6 7 8
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