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Lotto Statistical Trends - Mean, Standard Deviation, and Range

  Number Frequency   Overdue Numbers   Odd/Even Numbers   High/Low Numbers   Sum and Root Sum   Hot and Cold Numbers   Most Common Pairs   Most Common Triplets   Most Common Quadruplets   Most Common Quintupletss   Mean, STDEV, and Range Trend
 Latest Draw Result
  Number Frequency   Overdue Numbers   Odd/Even Numbers   High/Low Numbers   Sum and Root Sum   Hot and Cold Numbers   Most Common Pairs   Most Common Triplets   Most Common Quadruplets   Most Common Quintupletss   Mean, STDEV, and Range Trend
 About Lotto

This chart displays the statistical trends of consecutive draws, showing how the mean, standard deviation, and range of numbers drawn vary over time. This illustrate the variability and distribution patterns inherent in random lottery results.

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Lotto Charts

 
Last 75 draws
From Nov. 27, 2024 To Aug. 13, 2025

Mean, Standard Deviation (STDEV), and Range Trend

The Mean line indicates the average drawn number per draw, the Standard Deviation (STDEV) line shows how widely spread the numbers in each draw are from their respective mean, and the Range line, calculated as the difference between the highest and lowest number in each draw, shows the gap between the highest and lowest numbers drawn.

Together, these statistics and their trends offer a clearer picture of the variability inherent in lotto draws, though they do not imply predictability, as true lottery systems are designed to be random. It helps to observe whether the statistical properties of the drawn numbers exhibit any pattern, volatility, or clustering over time.

Mean
Standard Deviation
Range

Statistical Analysis

The Mean remains relatively stable, with no clear long-term shift towards higher or lower averages. Overall, the mean values fluctuate significantly throughout the dataset, reflecting the randomness expected in lottery outcomes.

Average Mean
28.26
Highest Mean
44.33
Lowest Mean
14.50
Mean Trend
Decreasing

The Standard Deviation (STDEV) shows the values remain relatively stable, showing a consistent mix of tightly grouped and more spread-out draws. In general, the standard deviation values fluctuate significantly across the dataset.

Average STDEV
14.7
Highest STDEV
20.91
Lowest STDEV
6.09
STDEV Trend
Increasing

The Range remains generally stable, with fluctuations that balance out over time. Overall, the range values fluctuate significantly across the dataset, highlighting variations in the spread of drawn numbers.

Average Range
41.03
Highest Range
56.00
Lowest Range
19.00
Range Trend
Increasing

Format Changes in UK Lotto

The UK National Lottery's Lotto game has undergone several significant format changes since its launch in 1994, all aimed at keeping the game fresh, exciting, and capable of generating larger jackpots. See the table below.

Period Format Bonus Ball
June 1999 6 numbers out of 49 1 from the same number pool
October 2015 6 numbers out of 59 1 from the same number pool

How UK Lotto Format Changes Affect Your Number Strategy.

These format changes have a direct impact on statistical analysis. Mixing frequency data across different formats is not advisable because each version of the game has a different number pool and probability structure.

For example, a number that appeared frequently in the 6/49 number format may have done so due to higher individual draw probability, but that same frequency can be misleading in the 6/59 format.

Therefore, for meaningful analysis, it’s essential to treat each format as its own distinct dataset. Analyzing trends or frequencies should be restricted to results from within the same format period, especially if the goal is to inform number selection in the current game structure.

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