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Question

The price of different items ordered for a birthday party is given. Find the mean deviation of the data.


A
5.8
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B
6.9
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C
3.7
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D
7.2
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Solution

The correct option is C 3.7
The given data set is

11, 7, 8, 23, 12, 6, 10

Mean deviation = sum of absolute values of deviations from meannumber of observations

The mean of the data set is the sum of the data divided by the number of data values

Mean = sum of all datanumber of data

= 11+7+8+23+12+6+107

= 777

= 11

Mean deviation is:
|1111|+|117|+|118|+|1123|+|1112|+|116|+|1110|7

= 0+4+3+12+1+5+17

= 267 = 3.7

Hence, mean deviation of the data is 3.7


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