(a) Mean calculation:
Given data set: 2.5, -6.7, 3.2, -6.7, 5.8
Sum of the data:
2.5 + (-6.7) + 3.2 + (-6.7) + 5.8 = -1.9
Number of data points:
5
Mean:
\frac{-1.9}{5} = -0.38
(b) Mode calculation:
Mode is the most frequently occurring value in the data set.
The data set 2.5, -6.7, 3.2, -6.7, 5.8
The number -6.7 appears twice, more frequently than any other number in the set.
Mode:
-6.7