it takes trevon ten hours to clean an attic. cody can clean the same attoc in seven hours.find how long it would take them if th
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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:
In this case, it is the deviation of the number of floors in the building in the city.