Average Gains and Starting Measurements
I have decided to run through the data gathered here at Thunder’s Place to see just what can be expected from our hard earned science experiments here. Many members ask for estimates of what they can expect to gain. My goal was to crunch the data and see just what these numbers may be. Additionally, I went through the numbers to find the average starting statistics here at Thunder’s Place, just to see how they stacked up against the studies done around the world.
First let’s begin with the assumptions I made in order to cut down the false statistics found here on the website.
- Length Statistics over 11 inches were discarded as this size is an extreme outlier
- Girth Statistics over 8.5 inches were discarded for the same reason
- Length Statistics under 2 inches were discarded
- Girth Statistics under 2 inches were discarded
- Length Gains of over 4 inches were discarded as there has not been anyone here who has documented such an extraordinary gain
- Girth Gains of over 3 inches were discarded for the same reason
- Length Decreases over 1 inch were discarded due to the likelihood that these are false statistics
- Girth Decreases over 1 inch were discarded for the same reason
- Members who created a single entry were discarded when calculating gains and rates of gains, but were included in the starting statistics
I can assure each of you that those statistics that fall above and below the assumptions made above are a very small portion of the overall sample size, and can be assumed to have a negligible effect on the resulting statistics after their removal.
Statistics were calculated for two groups. A group of only gainers, and a group that contained everyone within the reasonable range of statistics. In addition to these two groups, statistics for inches and centimeters are provided.
Resulting Statistics can be found below:
Average Starting Length: 6.3582 in - 16.1499 cm
Standard Deviation: 0.8203 in - 2.0836 cm
Average Starting Girth: 5.0179 in - 12.7455 cm
Standard Deviation: 0.5427 in - 1.3786 cm
The first thing that stands out to me when examining the data, is the clear tendency towards rounding to the nearest quarter/half/whole inch that comes with self-reported statistics. The tendency to round can mess with the accuracy of statistics, but it is assumed here that the rounding is reasonable and not excessive. The same quarter/half/whole inch grid can be seen on the centimeter graph as well. The scatter plots also indicate that the vast majority of users fall between 5 and 7 inches starting length (approx. 13.5 to 18.5 centimeters) and between 4.5 and 5.5 inches of girth (approx. 11.5 to 14 cm). The is confirmed by the averages listed above. Additionally, below the distribution of starting statistics can be seen in an easier to read format. The X axes of each graph are in the units listed in the graph title, while the Y axes are number of users falling into each category.
Average Overall Length Gain: 0.6384 in - 1.6216 cm
Standard Deviation: 0.5367 in - 1.3632 cm
Average Overall Girth Gain: 0.2854 in - 0.7248 cm
Standard Deviation: 0.3509 in - 0.8914 cm
Average Length Gain of Gainers: 0.7350 in - 1.8670 cm
Standard Deviation: 0.5234 in - 1.3296 cm
Average Girth Gain of Gainers: 0.4057 in - 1.0305 cm
Standard Deviation: 0.3333 in - 0.8465 cm
The above two graphs show the distribution of length and girth gains for all members who fell within the reasonable statistics range. As is quite apparent, the majority of gains occurred between 0 and 1 inch of BP Length (approx. 0 and 2.5 cm) and between 0 and 0.5 inches of Mid Shaft Girth (approx. 0 and 1 cm). We can again see the tendency to round gains towards the nearest quarter/half/whole inch amongst users, as again the gains statistics line up nicely along the grid lines. We can see the distribution of the gains statistics appears in the shape of a comet, with the majority of data point appearing close to the origin at 0 gains in either dimension, and the data points becoming more sparse as they move away from the origin, especially in the positive direction of both axes.
Something to notice about those who lost size in a penis dimension: these users are in the minority of the statistics by a wide margin. Additionally, no member reported losing both length and girth, and those that lost in one dimension commonly gained in the other dimension. Below the distribution of gains can be seen. These distributions show the distribution of those who gained, and does not include the small portion of users who reported negative gains.
Percentage of Users who Gained Length: 89.60%
Percentage of Users who Gained Girth: 77.12%
Now what do all of these numbers mean? The standard deviation of each average presented above show how likely an individual is to deviate from the statistical average. The way the standard deviation works is as such: 68% of users were within 1 standard deviation of the indicated measurement, 95% of them were within 2 standard deviations, and 99.7% of them were within 3 standard deviations of the average.
We can also see that when including decreases in size between first and last measurements, the standard deviation for gains is greater than the average gain. This means that Thunder’s Place gain statistics are highly erratic, ie. they vary greatly. However, when considering only those who experienced gains, the standard deviations, as expected, fall below the value of the average gain. Despite this, they still remain a significant percentage of the average gain, indicating a flatter bell curve distribution of gains. This means that while a good portion of users can expect gains near that average number, the gains of each user will obviously vary widely from individual to individual.
What about the effect your starting size has on your ability to gain? Below are four graphs that show the distribution between a starting dimension of each member, and the gains experienced by that member in the corresponding dimension. This was done in both inches and centimeters, as usual.
The above four graphs reveal some interesting trends of growth here at Thunder’s Place. Commonly it is thought that a smaller starting size allows for greater gains, and this can be seen easily on the length graphs. These graphs exhibit a clearly triangular shape, indicating that greater gains were experienced by those who started on the lower end of sizes. As one moves rightward across the x-axis of starting size, it can be seen that the BPEL length gains drop off. However, a different trend is seen in the girth department. The decreasing triangle clearly seen in the length graphs is much less visible in the girth graphs. In fact, these girth graphs exhibit a much flatter shape overall. For the most part it appears that no matter the starting size, a 0.5 inch gain in girth (approx. 1.3 centimeters) is reasonable for members. There is a small trend towards smaller starting girths experiencing greater girth gains, but it is much less apparent than in the length gain graphs.
A positive result of the study reveals that a very high proportion of the users here at Thunder’s Place report positive gains. I think we may be onto something here at Thunder’s :shrug:
Summaries of the averages of starting stats, gain stats, and percentage of users who gained can all be found below in easier to read tables as attachments.
Hopefully you all find this helpful!
-Statistics Compiled on the 25th of February, 2016-
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Best of luck to all fellow PE-ers in their journey.
Last edited by memento : 03-06-2016 at . Reason: More inline images