Final answer:
When summarizing data without including certain values, the median may be affected.
Step-by-step explanation:
When summarizing data without including certain values, the median may be affected. The median is the middle value of a set of data when it is arranged in ascending or descending order. If Helga and Leonard are excluded from the data, the median will change because their values will no longer be included in the calculation.
For example, let's say the data set is: 1, 3, 5, 7, Helga, Leonard. The median without including Helga and Leonard would be 5, as they are the middle values. However, if Helga and Leonard are excluded, the new median would be 4, as the data set becomes: 1, 3, 5, 7.