Answer-
The step that contains the first error Carmela made is, 'she did not find the absolute values of the differences.'
Solution-
In calculation of mean absolute deviation, we find each distance from the mean, because it is the absolute value of the deviation (how far from the mean).
[tex]\text{Mean Deviation}=\dfrac{\sum \left | x-\mu \right |}{N}[/tex]
The steps to calculate mean absolute deviation,
- Calculate the mean of all values
- Calculate the distance of each value from that mean (subtract the mean from each value and ignore minus signs)
- Then calculate the mean of those distances.
Therefore, because she did not find the absolute values of the differences, is her first error.
