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{{Probability distribution |
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  name      =Arcsine|
  type      =density|
  pdf_image  =[[Image:Arcsin density.svg|350px|Probability density function for the arcsine distribution]]|
  cdf_image  =[[Image:Arcsin cdf.svg|350px|Cumulative distribution function for the arcsine distribution]]|
  parameters =none|
  support    =<math>x \in [0,1]</math>|
  pdf        =<math>f(x) = \frac{1}{\pi\sqrt{x(1-x)}}</math> |
  cdf        =<math>F(x) = \frac{2}{\pi}\arcsin\left(\sqrt x \right)</math> |
  mean      =<math>\frac{1}{2}</math> |
  median    =<math>\frac{1}{2}</math> |
  mode      =<math>x \in {0,1}</math> |
  variance  =<math>\tfrac{1}{8}</math> |
  skewness  =<math>0</math>|
  kurtosis  =<math>-\tfrac{3}{2}</math>|
  entropy    = |
  mgf        = <math>1  +\sum_{k=1}^{\infty} \left( \prod_{r=0}^{k-1} \frac{2r+1}{2r+2} \right) \frac{t^k}{k!}</math>|
  char      = <math>{}_1F_1(\tfrac{1}{2}; 1; i\,t)\ </math>|
}}
 
In [[probability theory]], the '''arcsine distribution''' is the [[probability distribution]] whose [[cumulative distribution function]] is
 
:<math>F(x) = \frac{2}{\pi}\arcsin\left(\sqrt x\right)=\frac{\arcsin(2x-1)}{\pi}+\frac{1}{2}</math>
 
for 0&nbsp;≤&nbsp;''x''&nbsp;≤&nbsp;1, and whose probability density function is
 
:<math>f(x) = \frac{1}{\pi\sqrt{x(1-x)}}</math>
 
on&nbsp;(0,&nbsp;1). The standard arcsine distribution is a special case of the [[beta distribution]] with ''&alpha;''&nbsp;=&nbsp;''&beta;''&nbsp;=&nbsp;1/2. That is, if <math>X</math> is the standard arcsine distribution then <math>X \sim {\rm Beta}(\tfrac{1}{2},\tfrac{1}{2}) \ </math>
 
The arcsine distribution appears
 
* in the [[Lévy arcsine law]];
* in the [[Erdős arcsine law]];
* as the [[Jeffreys prior]] for the probability of success of a [[Bernoulli trial]].
 
==Generalization==
 
{{Probability distribution |
  name      =Arcsine – bounded support|
  type      =density|
  pdf_image  = Need image|
  cdf_image  = Need image|
  parameters =<math>-\infty < a < b < \infty \,</math>|
  support    =<math>x \in [a,b]</math>|
  pdf        =<math>f(x) = \frac{1}{\pi\sqrt{(x-a)(b-x)}}</math> |
  cdf        =<math>F(x) = \frac{2}{\pi}\arcsin\left(\sqrt \frac{x-a}{b-a} \right)</math> |
  mean      =<math>\frac{a+b}{2}</math> |
  median    =<math>\frac{a+b}{2}</math> |
  mode      =<math>x \in {a,b}</math> |
  variance  =<math>\tfrac{1}{8}(b-a)^2</math> |
  skewness  =<math>0</math>|
  kurtosis  =<math>-\tfrac{3}{2}</math>|
  entropy    = |
  mgf        = |
  char      = |
}}
 
===Arbitrary bounded support===
The distribution can be expanded to include any bounded support from ''a''&nbsp;≤&nbsp;''x''&nbsp;≤&nbsp;''b'' by a simple transformation
 
:<math>F(x) = \frac{2}{\pi}\arcsin\left(\sqrt \frac{x-a}{b-a} \right)</math>
 
for ''a''&nbsp;≤&nbsp;''x''&nbsp;≤&nbsp;''b'', and whose [[probability density function]] is
 
:<math>f(x) = \frac{1}{\pi\sqrt{(x-a)(b-x)}}</math>
 
on&nbsp;(''a'',&nbsp;''b'').
 
===Shape factor===
 
The generalized standard arcsine distribution on (0,1) with probability density function
 
:<math>
\begin{align}
f(x;\alpha) & = \frac{\sin \pi\alpha}{\pi}x^{-\alpha}(1-x)^{\alpha-1} \\[6pt]
\end{align}
</math>
 
is also a special case of the [[beta distribution]] with parameters <math>{\rm Beta}(1-\alpha,\alpha)</math>.
 
Note that when <math>\alpha = \tfrac{1}{2}</math> the general arcsine distribution reduces to the standard distribution listed above.
 
==Properties==
* Arcsine distribution is closed under translation and scaling by a positive factor
** If  <math>X \sim {\rm Arcsine}(a,b) \  \text{then }  kX+c \sim {\rm Arcsine}(ak+c,bk+c) </math>
* The square of an arc sine distribution over (-1, 1) has arc sine distribution over (0, 1)
** If  <math>X \sim {\rm Arcsine}(-1,1) \  \text{then }  X^2 \sim {\rm Arcsine}(0,1) </math>
 
==Related distributions==
 
* If U and V are [[Independent and identically distributed random variables|i.i.d]] [[Uniform distribution (continuous)|uniform]] (−π,π) random variables, then <math>\sin(U)</math>, <math>\sin(2U)</math>, <math>-\cos(2U)</math>, <math>\sin(U+V)</math> and <math>\sin(U-V)</math> all have a standard arcsine distribution
* If <math>X</math> is the generalized arcsine distribution with shape parameter <math>\alpha</math> supported on the finite interval [a,b] then  <math>\frac{X-a}{b-a} \sim {\rm Beta}(1-\alpha,\alpha) \ </math>
 
==See also==
* [[Arcsine]]
 
==References==
*{{eom|id=A/a013160|first=B.A.|last= Rogozin}}
{{ProbDistributions|continuous-bounded}}
{{Common univariate probability distributions}}
 
[[Category:Continuous distributions]]
[[Category:Probability distributions]]

Latest revision as of 18:47, 9 March 2014

With the backdrop of the Superstition Mountains, you have a scenic mountain bike trail network that can embody every quality of off-road riding in the Southwest. For more about Womens mountain bike sizing. visit the web page. You'll ask yourself this question in conjunction with "how much will you pay. Ideally you will want to purchase accessories which enable you to be as safe as possible so here you will find out about the best safety accessories available to purchase. It has a round tire cross-section that is typical for Continental, and the Gravity - Arc tread that lead to a playful handling. Look at what other riders appreciate about their bikes.

On the road to the airport find your way to Lake Caburgua and then Trancura River. You want to be pedaling as hard as you can while other riders right next to you are doing the exact same thing. Experts recommend that runners drink only when thirsty. Since you are reading this article on the Cannondale Mountain bike I will assume that you already know about the exquisite design and reliability of this mountain bike. He is known for his expertise on the subject and on other Business and Finance related articles.

Folding bike tips on different types of foldable bikes. You always have to be ready while riding your bike. The tube sits next to your mouth so you can sip as you ride. Another important safety accessory is eye protection. Re-lube the chain carefully, making sure each link is covered with oil, spin the pedals backwards a few times, then wipe off any excess oil from the chain with an old rag.

Decide how and where you want to ride, then choose a mountain bike that fits your personal style, rather than that of the sales staff. Find more information about Hardtail mountain bikes here. These four websites are important to serious bikers. Instead of having fun playing with him (like a child with a favorite playmate), they evaluate his potential as a father. But that wasn't the bad part 'cause, see, those two almost invisible grey hairs were only a distraction from the real culprit.

When the helmet is in the correct position on the head, the straps can be adjusted so that they are snug across the side of the head and under the chin. Try finding the best bike for yourself at local shops, where you can take a test ride before you finally decide. Usually, alloy stems tend to be the more cost-effective of the two, however the high end of the level, aluminum stems which have been produced from high-grade alloys could be more expensive than carbon counterparts because they are lighter plus more responsive. Originally founded in 1962, Kenda spent a most of the last one-hundred years focused on cycling. Freeride or downhill forks are 'double-crown' suspension forks which can move up to ten inches re travel.