Refers to the theoretical number of a certain number in permutation 3, which is 1 time. The calculation formula is: number of theoretical periods = total bets 1000÷ number of direct elections of this type of number.

Such as "large size", this form has 125 direct election, and its theoretical period = 1000÷ 125=8.

2. Maximum missing value

Refers to the longest interval in the history of arranging three definite numbers.

For example, 4 in the second place, the longest interval period in history is 63, and the largest missing value is 63.

3. Average missing value

It refers to the average number of times that a number rank 3 appears in 1 since the lottery, and the calculation formula is: average missing value = total number of periods ÷ the total number of times that this number Anhui Fucai 15 plays.

For example, if the first digit of the number is 0, it will be played * * * 20 times in the lottery 18 1 with an average missing value of = 18 1÷20=9.05.

4. Currently missing values

Refers to the current interval number of a number in arrangement 3, that is, how many consecutive periods have not been opened at present.

5. Maximum deflection value

The calculation formula is, maximum skewness = maximum missing value ÷ average missing value.