If the mean of a set of 12 number is 13 then the sum of the number is?

156

Step-by-step explanation:

Let the sum of the set of numbers  = S

Sothe mean would be calculated as the sum of the set divided by its number of entries, or :

S / 12  = 13     multiply both sides by 12

S  = 13 * 12   =  156  sothe sum is 156

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.