Across the last 20 Спортлото «4 из 20» Мини draws, number 18 (field 2) has the longest current drought — missing in 12 of 20 consecutive draws; the longest active streak belongs to number 18 (field 1), hitting in 2 of 20 consecutive draws. Data includes draw #1842 of 28.07.2026.
The Wald–Wolfowitz test flags |Z| ≥ 1.96 for 3 of 40 numbers — on a sample of 20 draws such isolated outliers are expected and are not evidence of manipulation.
Runs analysis tracks continuous sequences of identical outcomes: a streak means a number hit several draws in a row, a drought means it missed just as many in a row. The Wald–Wolfowitz test compares the actual count of such runs with the count expected for a random sequence.
Z = (R − E[R]) / σR, E[R] = 2n₁n₂/N + 1
How the Z-statistic is computed for each number:
- R — the actual number of runs: continuous hit/miss stretches in the draw history;
- n₁ — draws where the number hit; n₂ — draws where it missed; N = n₁ + n₂ — sample size;
- σ_R — the standard deviation of the run count: √(2n₁n₂(2n₁n₂ − N) / (N²(N − 1)));
- with |Z| < 1.96 the sequence is considered random (significance level 0.05).
Where to next
Number Frequency
How many times each Спортлото «4 из 20» Мини number has been drawn — the source of hot and cold numbers.
OpenHit Intervals
Gaps between hits of every number: average interval and current skip.
OpenDraw Autocorrelation
Whether Спортлото «4 из 20» Мини draws have memory: correlation of sums across lags.
OpenPearson χ² Test
Drum bias: which numbers deviate most from the uniform expectation.
OpenQuestions about Спортлото «4 из 20» Мини Streaks and Droughts
What is a runs test?
A statistical method that studies runs — continuous sequences of identical outcomes. For a lottery these are hit streaks (a number drawn several draws in a row) and droughts (a number missing just as many draws in a row). The method answers whether these alternations look random.
What is the Wald–Wolfowitz test?
A classic randomness test for a binary sequence. It counts the actual number of runs R and compares it with the value expected for a random sequence, E[R] = 2n₁n₂/N + 1. The deviation is expressed as a Z-statistic: the further Z is from zero, the less random the sequence looks.
What does the Z-statistic mean in a runs test?
Z is the actual number of runs minus the expected number, divided by the standard deviation. |Z| > 1.96 means the sequence is non-random with 95% confidence: positive Z — alternation is too frequent, negative Z — continuous runs are too long.
Should I bet on numbers with a long drought?
A drought does not raise a number’s probability — every draw is independent, and in a fair lottery the test confirms it. But as a selection system runs analysis works: if you prefer picking numbers by statistics rather than at random, mark the numbers with interesting runs in the table — a click adds them to the combination generator on this very page.
Is the Спортлото «4 из 20» Мини lottery random?
The runs test is one of the standard ways to check: it catches both overly long runs and suspiciously frequent alternation. For the full picture see autocorrelation (memory between draws) and the Pearson χ² test (bias of individual number frequencies) — links in the Where to next block.