Answer:
Explained
Step-by-step explanation:
The standard deviation is a statistical tool that measures the degree of spread out of data in a set. it is calculated from the square root of variance of a data set. Standard deviation is best tool to be used it takes into account the varying spread about the mean since each data in a set would have different spread with respect to the mean of the data.
It also informs about the average of variation of data from the mean of population. It divides the data to the upper values from the mean and lower values from the mean. This give the best inferences of the data
