My Math Forum Can someone help me find the dispersion or variability in...

 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 $\Sigma(x\ -\ \mu)^2f(x)$

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