News flash: AXIS & ALLIES ANNIVERSARY EDITION due out oct 23 08

@Panther
Thank you very much !

@COJOH

Well I ordered all the memoir 44 expansions that they had listed earlier in the year, and I’ve received all the available ones so far. I’m still waiting on 2 but they’re shipped when available. So I guess if you’re happy to wait then you’ll get it

Wow - huge help - Thank you!  And I feel like an idiot because I have that rulebook already downloaded and never noticed they were all in there.  Thanks!

Also…
All units are expendable, if the expenditure accomplishes something. Most units will be expended, but the challenge is to have them go in a way that they gave their money’s worth. Another important aspect of the game, which should be apparrent to a veteran player, or one with intelligence, is shielding of units. Some units (the more expensive ones) need to be protected by the less expensive ones. Infantry need to take hits for tanks, Destroyers and Cruisers should take hits for carriers… etc. Being able to scrape your expensive and better units out of a fight is essential for continuing operations and saving money. Make your enemy bleed more than you do.

@Cmdr:

If you are lucky and Japan is not primed to take India round 2, an Indian IC can be a godsend.

If Germany did not hit Egypt, than an Egyptian IC is even better! (Italy has no chance, not with 4 Infantry, Artillery, Armor, Fighter, Bomber in Egypt at the end of England 1.)

I like one in Philippines as well, FIC isn’t half bad either.

France works well for the Allies too.

If your building in France, Phil, Man, or FIC doesn’t that mean the game is well in progress and your at stages you can’t really plan for at the begining of a game?  And if the UK happened to take France it is so darn close to it I would hesitate to build an IC there (unless making massive amounts of cash).

A Brazil factory seems pointless/ a liabilaty, A Norway factory for the UK seems redundant (unless they are making massive amts of cash) but may be OK for the US player.  Canada seems silly.

I have never been in a position to be able to consider an early IC build in Egy or India.  If one insists on an early factory build I would say SAF is easily the most defendable option, but the better option if it can be done would be a T2 Aussie buy

:-)

This thread appears to be long dead, but I never get tired of math questions!  :-)

To answer the original question: The statistics of when a bomber gets shot down are determined by something called the geometric distribution, which you can find plenty of info about at http://en.wikipedia.org/wiki/Geometric_distribution.  The geometric distribution describes the first occurrence of an event when you make repeated, independent trials.  For example, the number of times you have to flip a coin before getting heads; the number of times you have to be dealt a poker hand before getting a royal flush; and the number of times you have to roll a die before getting a 1 are all described by geometric distributions.  Once you know the probability of success in a single event, the geometric distribution tells you how long you have to wait before seeing the first success.

Some of the information for the geometric distribution:
–-The probability of getting your first success (in our example “success” is the bomber getting shot down!) on the nth turn is (1/6)*(5/6)^(n-1).  This is because, in order to be shot down on the nth turn, the bomber must first survive the preceding n-1 turns, which has a probability of (5/6)^(n-1), and must then be shot down on turn n, which has a probability of 1/6.
–-The probability of getting your first success by the nth turn is 1 - (5/6)^n.  This is just 1 minus the probability of the bomber surviving the first n turns.  (It’s also the sum of the probabilities of getting shot down on turn 1, 2, …, up to n, but that’s the long way to do it!)

Given this, a number of other facts can be calculated (I’ll spare you the details…)  The question “When will the bomber, statistically speaking, be shot down?” has three different answers: the mean, median, and mode.  Here’s what each of those is:
—The mode is the single turn on which the bomber is most likely to be shot down.  This may be surprising, but it’s the very first turn!  The probability of getting shot down is the same (1/6) on all turns, provided the bomber makes it to that turn , but first it must survive all the turns before it.  Hence, the first turn is the most likely turn-of-death since the bomber doesn’t have to survive any prior turns in order to reach it.
–-The median is the first turn for which the bomber has a 50% chance of getting shot down before it.  This is the fourth turn, because the probability of getting shot down on one of the first four turns is 52% whereas the probability of surviving the first four turns is 48%.  So it’s about 50-50 whether the bomber survives at least 4 turns.
–-The mean , also known as the expected value, is the average number of turns that the bomber will survive.  This is 6 turns.  It turns out that you can actually calculate this by taking the reciprocal of the 1/6 probability of getting shot down on a given turn, although the reason why that works is slightly less obvious than it might seem.

So, which of the mean, median, and mode is the most useful?  When should we expect to lose the bomber?  Well, the mode is the least useful for answering this sort of question.  One can make a case for either the mean or the median, but for the types of calculation that people usually have in mind, the mean is the way to go.  For example, if you’re trying to figure out the average amount of economic damage inflicted minus damage received from each bombing raid, then the statistic you want is the average, aka the mean.

Of course, the question of whether bombing raids are worth doing involves a lot more than calculating the average IPC’s lost and destroyed.  My test: If you want to decide whether bombing a given country with your country is useful, ask yourself, “Would I destroy $10 of mine if I also got to destroy $10 of theirs?”  If the answer is “Heck yes!” then SBR’s are useful.  For example, Japan bombing Russia generally makes sense, as does US or UK bombing Germany.  A weaker power bombing a stronger power is usually not so smart.

BUMP

can we possibly sticky this, as it is helpful?