Medidas de dispersion

Medidas de dispersion

1. Variance:

   • can be measured for instance by the range or the interquartile range

2. standard deviation

   • measures of variability is that they take into account all the values of a variable.

3. variance formula

   • 
     2 stands for the variance.
     • This part of the formula means that from every observation () you have to subtract the mean value of that variable (̅). Next, you have to square all these values and add them up.
     • The result is what we call the “sum of squares”

4. standard deviation

   • is the measure of dispersion used most often

5. larger the variability.

   • the more the values are spread out around the mean.