If with symmetrical data, asymmetrical data is added, it will have a great effect on the mean.
Explanation:
Symmetrical data is the data or the situation in which the values of the variables occur at the same or the regular intervals. The mean, median and mode occur at the same point of this symmetrical distribution.
Since this distribution is in a particular symmetry and occur at regular intervals, they do not skew, unlike in the case of the asymmetrical distribution. If you fold the histogram in half of the symmetrical distribution, it looks about the same on both sides.
