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Binomial distribution and lottery 
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#1
Feb2012, 04:49 AM

P: 28

Hi there, I'm looking at a problem and wanted some help to advise if I'm going in the right direction.
I need to test if the number of times a lotto ball has appeared in a draw fits a binomial distribution. I have collated the data and ultimately will do a hypothesis test. The draw consists of 5 balls from 150. there have been 347 draws to date and therefore 1735 balls drawn. Taking ball number 1 which has been drawn 31 times as an example I need to check that if the number of times it has been drawn fits a binomial distribution. I know the formula for the bin. dist but wondered what values for the probability and what number I would need to use. Once I know this would I then set up a hypothesis test at 5% siginificance level to see if the null hypothesis is rejected or accepted? Thanks for your help in advance. felix 


#2
Feb2012, 06:17 PM

P: 300




#3
Feb2112, 11:41 AM

P: 28

When you say two tailed would my X's (r.v) be the lowest value of a number appearing (in this case 25) and the highest (and 51). Add a continuity correction 24.5 and 51.5 respectively and calculate the z test and see if it is significant?



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