Yusef adds all of the values in his data set and then divides by the number of values in the set. what is yusef most likely finding?

He is most likely finding the mean of the data.

its D)the mean.

Explanation:

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.