The answer is a yard
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it is something that is almost the same if you think
The measurements for all members of the sample are the same.
They are effectively the same but the standard deviation is more popular because the units of measurement are the same as those for the variable.
No. The average of the deviations, or mean deviation, will always be zero. The standard deviation is the average squared deviation which is usually non-zero.
100. an intellegence quotient (IQ) is a statistical measure that compares an individual against the average of indiviudals the same age. so, the average is always 100 regardless of the age. However, the average/score of a 42yo is not the same as 30yo... for example, an IQ score of 100 does not mean the same thing for a 16yo as it does for a 50yo, they are age specific.