List data set: List the data set and understand what is being asked.The data set given is: −7, −3, −2, −7, −4, −5, −4, 0. We are asked to find the mean (average) of these numbers.
Add up numbers: Add up all the numbers in the data set to find the sum.Calculation: (−7)+(−3)+(−2)+(−7)+(−4)+(−5)+(−4)+0=−32.
Count values: Count the number of values in the data set.There are 8 numbers in the data set.
Calculate mean: Divide the sum of the data set by the number of values to find the mean.Calculation: −32÷8=−4.