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January 31st, 2012, 11:05 AM  #1 
Newbie Joined: Jan 2012 Posts: 14 Thanks: 0  Can someone help me find the dispersion or variability in...
I need to find the variability or dispersion in this probability equation 0.97*0 + 0.02*1 + 0.01*2 =0.04 Any help? 
January 31st, 2012, 11:06 AM  #2 
Newbie Joined: Jan 2012 Posts: 14 Thanks: 0  Re: Can someone help me find the dispersion or variability i
The original problem There is a .97 chance that no accident will occur during any particular day at a racetrack of local importance. the probability of one accident a day is .02, and the probability of two accidents is .01. a. What is the expected number of accidents in a day? 
January 31st, 2012, 10:43 PM  #3 
Senior Member Joined: Apr 2011 From: USA Posts: 782 Thanks: 1  Re: Can someone help me find the dispersion or variability i
Variance is 

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dispersion, find, variability 
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