What index characterizes the relative measure of variation of the sign in the statistical aggregate?

Name the type of grouping that is used for studying the availability and direction of connection between signs, from which one is effective, and another - factor that affects the result:

Calculate the average yield of crops having following data: n₁=10, n₂= 5, n₃=5, x₁=25, x₂=31, x3=28). Calculate the average yield

Statistical pattern as an important statistical category includes the following conformities

Statistical grouping – is:

Dispersion relatively to any value A which is not equal to the arithmetic middling (A ≠0) is:

Match names of average values with the methods of their calculation:

Since the beginning of the year inflation increased on 2%. What will be the inflation rate for December 1?

The enterprise planned to increase production during the year on 5%, and actually increased on 7,5%. Calculate the level of the plan execution.

Variation - is