Answer
The mean is 1.889, mode: -2, the median is 1.5, the mid range is 3.
Work Step by Step
The mean can be counted by summing all the data and dividing it by the number of data: $\frac{11+3+0-2+3-2-2+5-2+7+2+4+1+8+1+0-5+2}{18}=1.889$, the mean is 1.889. The mode is the data occurring the most times, which here is -2 appearing 4 times. The median is the average of the 1 or 2 (here 2) middle data: (2+1)/2=1.5, the median is 630.5. The mid range is the average of the highest and the lowest data: (11-5)/2=3, the mid range is 3. These values do not support the legend, because all of them are a lot lower than 6.8.
