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	<title>Comments on: No MLB Games? Go To Everett</title>
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	<link>http://www.ussmariner.com/2008/07/14/no-mlb-games-go-to-everett/</link>
	<description>Seattle Mariners blog and general baseball discussion</description>
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		<title>By: busplunger</title>
		<link>http://www.ussmariner.com/2008/07/14/no-mlb-games-go-to-everett/comment-page-1/#comment-290335</link>
		<dc:creator>busplunger</dc:creator>
		<pubDate>Wed, 16 Jul 2008 16:28:52 +0000</pubDate>
		<guid isPermaLink="false">http://ussmariner.com/?p=5489#comment-290335</guid>
		<description>I should clarify that I&#039;m randomly grabbing a hitter from the pool of ten each time I run the event.</description>
		<content:encoded><![CDATA[<p>I should clarify that I&#8217;m randomly grabbing a hitter from the pool of ten each time I run the event.</p>
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		<title>By: busplunger</title>
		<link>http://www.ussmariner.com/2008/07/14/no-mlb-games-go-to-everett/comment-page-1/#comment-290334</link>
		<dc:creator>busplunger</dc:creator>
		<pubDate>Wed, 16 Jul 2008 16:26:06 +0000</pubDate>
		<guid isPermaLink="false">http://ussmariner.com/?p=5489#comment-290334</guid>
		<description>Okay, I just whipped up a quick simulation for peer review. :-) I don&#039;t have enough expertise in probability theory to use equations, so I&#039;m trying a brute force solution. This is going to be an overly simplistic representation, of course.

I created a semi-normal (i.e. symmetrical) distrubution of ten batting averages, assuming .250 is average:
[.200, .220, .230, .240, .245, .255, .260, .270, .280, .300]

Then, based on each average, I roll once for a hit (loosely simulating a single at-bat). If it&#039;s a successful hit, I &quot;predict&quot; that I&#039;m looking at a good (above-average) hitter. If it&#039;s a miss, I &quot;predict&quot; that I&#039;m looking at a bad (below-average) hitter. Since I already know the hitter&#039;s &quot;true&quot; average, I can compare the prediction to the actual value.

&lt;i&gt;My hypothesis is that a hit is a better predictor of a &quot;good&quot; hitter than a miss is a predictor of a &quot;bad&quot; hitter.&lt;/i&gt;

So I run the sim for 10,000,000 hitters.
Hit correctly predicts good hitter: 54.64%
Miss correctly predicts bad hitter: 51.54%

You can fiddle with the input values all you want to change the variance, but until the average average gets up to .500, then a positive outcome will always be a better predictor of an above-average hitter than a negative outcome predicts a below-average hitter.

&lt;b&gt;Huge disclaimer: none of this implies any statistical significance whatsoever!&lt;/b&gt; These outputs are still very close to 50%. Looking at a single outcome (or a small sample) to guess a hitter&#039;s performance is not a good idea.</description>
		<content:encoded><![CDATA[<p>Okay, I just whipped up a quick simulation for peer review. <img src='http://www.ussmariner.com/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' />  I don&#8217;t have enough expertise in probability theory to use equations, so I&#8217;m trying a brute force solution. This is going to be an overly simplistic representation, of course.</p>
<p>I created a semi-normal (i.e. symmetrical) distrubution of ten batting averages, assuming .250 is average:<br />
[.200, .220, .230, .240, .245, .255, .260, .270, .280, .300]</p>
<p>Then, based on each average, I roll once for a hit (loosely simulating a single at-bat). If it&#8217;s a successful hit, I &#8220;predict&#8221; that I&#8217;m looking at a good (above-average) hitter. If it&#8217;s a miss, I &#8220;predict&#8221; that I&#8217;m looking at a bad (below-average) hitter. Since I already know the hitter&#8217;s &#8220;true&#8221; average, I can compare the prediction to the actual value.</p>
<p><i>My hypothesis is that a hit is a better predictor of a &#8220;good&#8221; hitter than a miss is a predictor of a &#8220;bad&#8221; hitter.</i></p>
<p>So I run the sim for 10,000,000 hitters.<br />
Hit correctly predicts good hitter: 54.64%<br />
Miss correctly predicts bad hitter: 51.54%</p>
<p>You can fiddle with the input values all you want to change the variance, but until the average average gets up to .500, then a positive outcome will always be a better predictor of an above-average hitter than a negative outcome predicts a below-average hitter.</p>
<p><b>Huge disclaimer: none of this implies any statistical significance whatsoever!</b> These outputs are still very close to 50%. Looking at a single outcome (or a small sample) to guess a hitter&#8217;s performance is not a good idea.</p>
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		<title>By: Jeff Nye</title>
		<link>http://www.ussmariner.com/2008/07/14/no-mlb-games-go-to-everett/comment-page-1/#comment-290330</link>
		<dc:creator>Jeff Nye</dc:creator>
		<pubDate>Wed, 16 Jul 2008 15:14:57 +0000</pubDate>
		<guid isPermaLink="false">http://ussmariner.com/?p=5489#comment-290330</guid>
		<description>No. 

Small sample sizes are small sample sizes, whether they produce the result you&#039;re &quot;expecting&quot; or not.</description>
		<content:encoded><![CDATA[<p>No. </p>
<p>Small sample sizes are small sample sizes, whether they produce the result you&#8217;re &#8220;expecting&#8221; or not.</p>
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		<title>By: busplunger</title>
		<link>http://www.ussmariner.com/2008/07/14/no-mlb-games-go-to-everett/comment-page-1/#comment-290329</link>
		<dc:creator>busplunger</dc:creator>
		<pubDate>Wed, 16 Jul 2008 14:43:14 +0000</pubDate>
		<guid isPermaLink="false">http://ussmariner.com/?p=5489#comment-290329</guid>
		<description>&lt;blockquote&gt;Can you then tell me &lt;i&gt;how&lt;/i&gt; loaded it is, and in which direction?&lt;/blockquote&gt;
Of course not.

But let&#039;s say we&#039;re pulling coins from a jar where we know the average coin is weighted such that it flips 25% heads and 75% tails (w/ normal distribution). We randomly grab two coins from the jar and flip each coin only once. Coin A lands heads, Coin B lands tails. Clearly, neither result will have any statistical significance, but:

Hypothesis 1: Coin A is a &quot;heads&quot; coin (&gt; 25% heads)
Hypothesis 2: Coin B is a &quot;tails&quot; coin (&lt; 25% heads)

Wouldn&#039;t we have slightly more confidence that H1 would prove true if we repeated the coin flip 999,999 more times? Doesn&#039;t the occurrence of an improbable event give us slightly more information than the occurrence of a probable event?</description>
		<content:encoded><![CDATA[<blockquote><p>Can you then tell me <i>how</i> loaded it is, and in which direction?</p></blockquote>
<p>Of course not.</p>
<p>But let&#8217;s say we&#8217;re pulling coins from a jar where we know the average coin is weighted such that it flips 25% heads and 75% tails (w/ normal distribution). We randomly grab two coins from the jar and flip each coin only once. Coin A lands heads, Coin B lands tails. Clearly, neither result will have any statistical significance, but:</p>
<p>Hypothesis 1: Coin A is a &#8220;heads&#8221; coin (&gt; 25% heads)<br />
Hypothesis 2: Coin B is a &#8220;tails&#8221; coin (&lt; 25% heads)</p>
<p>Wouldn&#8217;t we have slightly more confidence that H1 would prove true if we repeated the coin flip 999,999 more times? Doesn&#8217;t the occurrence of an improbable event give us slightly more information than the occurrence of a probable event?</p>
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		<title>By: joser</title>
		<link>http://www.ussmariner.com/2008/07/14/no-mlb-games-go-to-everett/comment-page-1/#comment-290119</link>
		<dc:creator>joser</dc:creator>
		<pubDate>Tue, 15 Jul 2008 23:38:14 +0000</pubDate>
		<guid isPermaLink="false">http://ussmariner.com/?p=5489#comment-290119</guid>
		<description>&lt;i&gt;Food for thought: in a game where batters experience failure more often than success, a small sample of unusual success is slightly more meaningful than a small sample of unusual failure.&lt;/i&gt;

No it&#039;s not.  That&#039;s the definition of &quot;small.&quot;  Say I have a loaded coin.  Say I flip it twice.  Say it comes up once heads and once tails.  Can you then tell me &lt;i&gt;how&lt;/i&gt; loaded it is, and in which direction?</description>
		<content:encoded><![CDATA[<p><i>Food for thought: in a game where batters experience failure more often than success, a small sample of unusual success is slightly more meaningful than a small sample of unusual failure.</i></p>
<p>No it&#8217;s not.  That&#8217;s the definition of &#8220;small.&#8221;  Say I have a loaded coin.  Say I flip it twice.  Say it comes up once heads and once tails.  Can you then tell me <i>how</i> loaded it is, and in which direction?</p>
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		<title>By: joser</title>
		<link>http://www.ussmariner.com/2008/07/14/no-mlb-games-go-to-everett/comment-page-1/#comment-290118</link>
		<dc:creator>joser</dc:creator>
		<pubDate>Tue, 15 Jul 2008 23:36:10 +0000</pubDate>
		<guid isPermaLink="false">http://ussmariner.com/?p=5489#comment-290118</guid>
		<description>&lt;i&gt;The Mariners arenâ€™t weak there are they?&lt;/i&gt;

But the time he ends up in the majors they probably won&#039;t be.  See Clement and the catching position, for example.

But unless the FO undergoes an honest-to-god revolution, Raben will get traded for some overpriced relief pitcher or $10M/year bottom-of-the-rotation starter before he cracks the roster anyway.</description>
		<content:encoded><![CDATA[<p><i>The Mariners arenâ€™t weak there are they?</i></p>
<p>But the time he ends up in the majors they probably won&#8217;t be.  See Clement and the catching position, for example.</p>
<p>But unless the FO undergoes an honest-to-god revolution, Raben will get traded for some overpriced relief pitcher or $10M/year bottom-of-the-rotation starter before he cracks the roster anyway.</p>
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		<title>By: busplunger</title>
		<link>http://www.ussmariner.com/2008/07/14/no-mlb-games-go-to-everett/comment-page-1/#comment-290114</link>
		<dc:creator>busplunger</dc:creator>
		<pubDate>Tue, 15 Jul 2008 21:18:43 +0000</pubDate>
		<guid isPermaLink="false">http://ussmariner.com/?p=5489#comment-290114</guid>
		<description>Fun with small samples:

&lt;a href=&quot;http://minors.baseball-reference.com/players.cgi?pid=37121&quot; rel=&quot;nofollow&quot;&gt;Dennis Raben&lt;/a&gt;, Everett (45 PAs)
429/556/743 (1.299 OPS)

&lt;a href=&quot;http://minors.baseball-reference.com/players.cgi?pid=15714&quot; rel=&quot;nofollow&quot;&gt;Craig Wilson&lt;/a&gt;, Tacoma (18 PAs)
500/611/929 (1.540 OPS)

Food for thought: in a game where batters experience failure more often than success, a small sample of unusual success is slightly more meaningful than a small sample of unusual failure.</description>
		<content:encoded><![CDATA[<p>Fun with small samples:</p>
<p><a href="http://minors.baseball-reference.com/players.cgi?pid=37121" rel="nofollow">Dennis Raben</a>, Everett (45 PAs)<br />
429/556/743 (1.299 OPS)</p>
<p><a href="http://minors.baseball-reference.com/players.cgi?pid=15714" rel="nofollow">Craig Wilson</a>, Tacoma (18 PAs)<br />
500/611/929 (1.540 OPS)</p>
<p>Food for thought: in a game where batters experience failure more often than success, a small sample of unusual success is slightly more meaningful than a small sample of unusual failure.</p>
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		<title>By: Joe C</title>
		<link>http://www.ussmariner.com/2008/07/14/no-mlb-games-go-to-everett/comment-page-1/#comment-290104</link>
		<dc:creator>Joe C</dc:creator>
		<pubDate>Tue, 15 Jul 2008 18:59:11 +0000</pubDate>
		<guid isPermaLink="false">http://ussmariner.com/?p=5489#comment-290104</guid>
		<description>Raben has been playing of lot of RF and DH, but I&#039;ll bet he ends up as a 1B/DH type. 
The Mariners aren&#039;t weak there are they?</description>
		<content:encoded><![CDATA[<p>Raben has been playing of lot of RF and DH, but I&#8217;ll bet he ends up as a 1B/DH type.<br />
The Mariners aren&#8217;t weak there are they?</p>
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		<title>By: joser</title>
		<link>http://www.ussmariner.com/2008/07/14/no-mlb-games-go-to-everett/comment-page-1/#comment-290103</link>
		<dc:creator>joser</dc:creator>
		<pubDate>Tue, 15 Jul 2008 18:25:58 +0000</pubDate>
		<guid isPermaLink="false">http://ussmariner.com/?p=5489#comment-290103</guid>
		<description>Also: Josh Hamilton in the home run contest.  Meaningless.  But not boring.</description>
		<content:encoded><![CDATA[<p>Also: Josh Hamilton in the home run contest.  Meaningless.  But not boring.</p>
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		<title>By: Joe C</title>
		<link>http://www.ussmariner.com/2008/07/14/no-mlb-games-go-to-everett/comment-page-1/#comment-290090</link>
		<dc:creator>Joe C</dc:creator>
		<pubDate>Tue, 15 Jul 2008 16:18:05 +0000</pubDate>
		<guid isPermaLink="false">http://ussmariner.com/?p=5489#comment-290090</guid>
		<description>I caught four of Everett&#039;s games in the Tri-Cities. 
Raben didn&#039;t put up the stats that he had up to that point, but he did look good. He was patient, took some walks, and hit a couple screaming doubles. His opposite field power is almost amazing (not that that would be worth much in Safeco). 
Luis Nunez is really fast.
1B Fromm and 3B Tenbrink are both good LH hitters.
Wasn&#039;t too impressed by the pitching, but I missed the shutout they threw on Sunday.</description>
		<content:encoded><![CDATA[<p>I caught four of Everett&#8217;s games in the Tri-Cities.<br />
Raben didn&#8217;t put up the stats that he had up to that point, but he did look good. He was patient, took some walks, and hit a couple screaming doubles. His opposite field power is almost amazing (not that that would be worth much in Safeco).<br />
Luis Nunez is really fast.<br />
1B Fromm and 3B Tenbrink are both good LH hitters.<br />
Wasn&#8217;t too impressed by the pitching, but I missed the shutout they threw on Sunday.</p>
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