Final answer:
The minimal unusual value of 135.8 and the maximum unusual value of 155.9 given in the question are best described as outliers. These values fall outside the typical range of a data set, indicating that they are not representative of the general trend or distribution.
Step-by-step explanation:
With the given minimal unusual value of 135.8 and a maximum unusual value of 155.9, we need to determine between the mean, median, an outlier, or the range, which concept the provided data points represent. Firstly, the mean is the average of a set of numbers. The median is the middle value in an ordered set of data. An outlier is a value that is significantly higher or lower than most of the other values in a data set. Lastly, the range is the difference between the highest and lowest values in a data set.
In this case, the minimal unusual value and the maximum unusual value indicate values that are not typical for the data set, which suggests that they are outliers. These values are too specific to represent the mean or the median, and the range is a simple calculation of the difference between the highest and lowest values without any assessment of typicality. Therefore, the values provided are best described as outliers.
Outliers can have a significant impact on the mean by skewing it away from the median, which is less affected by extreme values. In certain data analyses, outliers may be removed or treated specially to prevent them from distorting the results.