SD?

What is your SD?

  • >5

    Votes: 8 15.4%

  • 5-3

    Votes: 3 5.8%

  • 3-2

    Votes: 9 17.3%

  • 2-1.5

    Votes: 14 26.9%

  • 1.5-1

    Votes: 11 21.2%

  • <1

    Votes: 7 13.5%
  • Total voters
    52
maxcube

maxcube

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I have an average of 24-25 seconds. My SD is around 3 for an A50. I don't think that that is too good. But I am curious about your SD. I heard in another thread that a low SD is good, and a high SD is a sign of good thing to come. The thing is, I don't know what is good or bad. Do I have a high SD, or a "normal" one?

Thank you.
 
Standard Deviation is a measure of dispersion around a mean value. A low SD means you are consistent, and a high SD means you're inconsistent. Those who say a high SD shows you have good things to come are just giving it a silver lining.
 
MTGjumper said:
Standard Deviation is a measure of dispersion around a mean value. A low SD means you are consistent, and a high SD means you're inconsistent. Those who say a high SD shows you have good things to come are just giving it a silver lining.
Click to expand...


So do I have a relatively high SD? I think that I do, but I am not 100% sure. Thanks.:)
 
yes, you have a reasonably high SD, but that is to be expected considering that your times aren't that fast (not trying to belittle you).

i personally dont think that a bad SD is much to be worried about - as long as you improve i think that is more important. once you reach a plateau of improvement your SD will most likely drop. I've always been horrifically inconsistent. targeting exactly why you get some worse and some better times, and working on them (or just being aware of them) can improve consistency.
 
I think it's probably your F2L that would cause further Deviation, as harder/awkward casing would take up an extra second of to.
Seem logical, does it not?

Anyone want to test this?
 
AvGalen said:
There is nothing wrong with a high SD. If you look at these results:
13.25 12.13 12.72 11.93 7.08
You can't really say that the last one is bad, just because it made the SD higher
Click to expand...

This also suggests it is better to take more than an avg of 5 if you want a more accurate SD.
 
Standard deviation is always Less than or equal to 1 or greater than or equal to -1.

If you are taking the longest time- the shortest time, then that is the range.

I'm to lazy to see if this would work, but if you'd like to calculate actual SD, I'll test it and post my results and how to do it.
 
bamman1108 said:
Standard deviation is always Less than or equal to 1 or greater than or equal to -1.

If you are taking the longest time- the shortest time, then that is the range.

I'm to lazy to see if this would work, but if you'd like to calculate actual SD, I'll test it and post my results and how to do it.
Click to expand...

What? I don't get that at all...
 
not_kevin said:
bamman1108 said:
Standard deviation is always Less than or equal to 1 or greater than or equal to -1.

If you are taking the longest time- the shortest time, then that is the range.

I'm to lazy to see if this would work, but if you'd like to calculate actual SD, I'll test it and post my results and how to do it.
Click to expand...

What? I don't get that at all...
Click to expand...

The absolute value is always less than or equal to 1. It can be any decimal, but it can't be 1.1 because it's greater than 1. It CAN be .5, .67, or -.9
 
bamman1108 said:
not_kevin said:
bamman1108 said:
Standard deviation is always Less than or equal to 1 or greater than or equal to -1.

If you are taking the longest time- the shortest time, then that is the range.

I'm to lazy to see if this would work, but if you'd like to calculate actual SD, I'll test it and post my results and how to do it.
Click to expand...

What? I don't get that at all...
Click to expand...

The absolute value is always less than or equal to 1. It can be any decimal, but it can't be 1.1 because it's greater than 1. It CAN be .5, .67, or -.9
Click to expand...

Um... I will give you a counterproof right now. Find the sd of this set of 12:
1,2,3,4,5,6,7,8,9,10,11,9001

Perhaps you're thinking of correlation coefficient?
 
not_kevin said:
bamman1108 said:
not_kevin said:
bamman1108 said:
Standard deviation is always Less than or equal to 1 or greater than or equal to -1.

If you are taking the longest time- the shortest time, then that is the range.

I'm to lazy to see if this would work, but if you'd like to calculate actual SD, I'll test it and post my results and how to do it.
Click to expand...

What? I don't get that at all...
Click to expand...

The absolute value is always less than or equal to 1. It can be any decimal, but it can't be 1.1 because it's greater than 1. It CAN be .5, .67, or -.9
Click to expand...

Um... I will give you a counterproof right now. Find the sd of this set of 12:
1,2,3,4,5,6,7,8,9,10,11,9001

Perhaps you're thinking of correlation coefficient?
Click to expand...

I'll ask my teacher tomorrow, because she's been teaching it as Standard deviation. But now that I look it up, it's something I've never dealt with before??? Now I'm confused. :confused:
 
That includes negative values though, and SD can't be negative.
Unless you interpreted it as "the range of SD is a subset of that range" rather than that being the range of SD, in which case, yes that should be true, since he specified the range of all real numbers (in that post only).

Although his other posts made it clear that what he meant is that the absolute value of SD should be between 0 and 1 inclusive, which is obviously not true.
 
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