Respuesta :
The difference between the mean and the median of the data is 1
Mean and median
Given data:
11, 12, 8, 12, 8, 8, 11, 11, 9
- Mean = Sum of data ÷ number of data
= (11 + 12 + 8 + 12 + 8 + 8 + 11 + 11 + 9) / 9
= 90 / 9
= 10
- Median = middle number
Arrange in ascending order
8, 8, 8, 9, 11, 11, 11, 12, 12
The middle number is 11
Therefore, the difference between the mean and the median of the data is 11 - 10 = 1
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