Dispersion will change if all the frequencies of row of distribution increase or decrease in a constant number of times

To statistical rows of distribution we refer:

Distribution of units of the aggregate in groups by the size of qualitative sign is called row of distribution

Which of the following dispersion correlations do not match the rule of adding variances:

Average value of the sign in two aggregates is the same. Can the variation of sign be different in these aggregates?

What indicators are used to characterize the variation?

What is the sum of deviations of individual values of the sign from the arithmetic middling?

Dispersion will change if all the frequencies of row of distribution increase or decrease in a constant number of times