2009-03-20, 10:54 PM
[COLOR="Red"]Long post here:
I'm guessing you are going to be using a two sample mean test (Kills, deaths). First off you are going to assume that your kills-deaths (I'm guessing you kill more than die) equals zero. This is your mu1-mu2=0. Next, I'm going to guess you will use a 95% confidence interval. Now is where the fun starts.
Get around 30-ish samples for kills and deaths per game. Or you can use less, if you will dotplot it, and see no skewness or outliers. To create your confidence interval, use the formula:
x1(kills mean)-x2(deaths mean) +/- t"star"(sqrt((s1^2/n1[s.d. of kills^2 divided by the sample]+(s2^2/n2))[same as kill, but for deaths]
For t"star", go on the internets, or this site http://davidmlane.com/hyperstat/t_table.html , and go to your d.f. (degrees of freedom=sample size-1 [so choose the same amount for each sample]) that is on the leftmost column, and your % will be .025, as this is 2 tailed.
Substitute everything in, and this should give you an interval of the true difference between your kills and death.
If this seems difficult to read, gimmie the numbers, and I'll give you your interval, for only 3 bucks![/COLOR]
I'm guessing you are going to be using a two sample mean test (Kills, deaths). First off you are going to assume that your kills-deaths (I'm guessing you kill more than die) equals zero. This is your mu1-mu2=0. Next, I'm going to guess you will use a 95% confidence interval. Now is where the fun starts.
Get around 30-ish samples for kills and deaths per game. Or you can use less, if you will dotplot it, and see no skewness or outliers. To create your confidence interval, use the formula:
x1(kills mean)-x2(deaths mean) +/- t"star"(sqrt((s1^2/n1[s.d. of kills^2 divided by the sample]+(s2^2/n2))[same as kill, but for deaths]
For t"star", go on the internets, or this site http://davidmlane.com/hyperstat/t_table.html , and go to your d.f. (degrees of freedom=sample size-1 [so choose the same amount for each sample]) that is on the leftmost column, and your % will be .025, as this is 2 tailed.
Substitute everything in, and this should give you an interval of the true difference between your kills and death.
If this seems difficult to read, gimmie the numbers, and I'll give you your interval, for only 3 bucks![/COLOR]