Answer:
Option B. The standard deviation of the number of floors per city is nothing.
Step-by-step explanation:
The standard deviation of a data set is the statistic that measures the deviance or dispersion of the data from the relative mean. In other words, it is is a measure of how spread the numbers are. The standard deviation is given by the following formula:
[tex]\sigma = \sqrt{\frac{1}{N}(x-\mu) ^{2} }[/tex]
In this case, it is the deviation of the number of floors in the building in the city.
