Professor martinez would like to describe the amount of variation there is in his data set which of the following should he calculate?

a) mean

b) mode

c) range

d) median

Consider 6x2 + 6x + 1. which term immediately tells you that this expression is not a perfect square trinomial? justify your answer

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude

Which one ? is the answer and how to find this answer