Powerball Statistical Trends - Mean, Standard Deviation, and Range

  Number Frequency   Power Ball 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   Mean Distribution   Range Distribution   STDDEV Distribtion   IQR Distribution   Clustering Distribution
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 Latest Draw Result
  Number Frequency   Power Ball 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   Mean Distribution   Range Distribution   STDDEV Distribtion   IQR Distribution   Clustering Distribution

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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Last 75 draws
From Jun. 20, 2024 To Nov. 20, 2025

Mean, Standard Deviation (STDEV), and Range Trend

The chart below presents the statistical trends of Powerball lotto combinations from Jun. 20, 2024 to Nov. 20, 2025 , covering 75 draws by tracking the mean, standard deviation, and range.

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
17.63
Highest Mean
27.00
Lowest Mean
10.00
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
9.06
Highest STDEV
12.35
Lowest STDEV
4.24
STDEV Trend
Decreasing

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
26.27
Highest Range
34.00
Lowest Range
12.00
Range Trend
Decreasing

Format Changes in Australian Powerball

The Australian Powerball lottery has undergone several format changes since its launch in 1996, each significantly impacting how number frequency analysis should be conducted. Below is the timeline of the Australian Powerball format changes:

Period Format Powerball
1996-2013 5 numbers from a pool of 45 (5/45) 1 number from the same pool of 45
March 1, 2013 - April 12, 2018 6 numbers from a pool of 40 (6/40) 1 number from a separate pool of 20 (1-20)
April 13, 2018 - Present 7 numbers from a pool of 35 (7/35) 1 number from a separate pool of 20 (1-20)

From 1996 to 2013, the game followed a 5/45 format, where players selected five main numbers from 1 to 45 and one Powerball from the same pool. In March 2013, the format changed to 6/40 + Powerball 1–20, meaning players had to choose six main numbers from 1 to 40 and a Powerball from a separate pool of 20. This shift altered the odds and made previous number frequency data less relevant. Then, in April 2018, the format changed again to its current form: 7/35 + Powerball 1–20. This increased the difficulty of winning the jackpot but introduced more prize divisions and larger potential jackpots.

How Australian Powerball 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 5/45 format may have done so due to higher individual draw probability, but that same frequency can be misleading in the 6/40 or 7/35 formats. Furthermore, changes to the Powerball pool—from 1–45 to 1–20—also significantly affect how often specific Powerball numbers appear.

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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