Answer
mean = 3
median = 3.5
no mode
Work Step by Step
$mean = [ (-9) + (-7) + 0 + 2 + 5 + 7 + 10 + 16 ]\div8 = 24\div8 = 3$
The median will be given by the average of the fourth and fifth values as follows:
$Median = ( 2 + 5 )\div2 = 3.5$
This data set contains no mode because each value in this data set occurs only once.