Statistics Help @ Talk Stats Forum - Probability
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Probability course and homework discussion. Probability distributions. Probability theory, stochastic processesenWed, 16 Apr 2014 09:42:42 GMTvBulletin60http://www.talkstats.com/images/misc/rss.pngStatistics Help @ Talk Stats Forum - Probability
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Probability that a normal random variable lies between 2 values
http://www.talkstats.com/showthread.php/55049-Probability-that-a-normal-random-variable-lies-between-2-values?goto=newpost
Tue, 15 Apr 2014 14:25:50 GMTHi all, I have been looking at this problem for a little while now and can't get anywhere with it. All of my notes relate to a variable lying between 2 z-scores, not 2 values so I'm not exactly sure where to start.

The question is:

Suppose X is a normal random variable (mean=11, SD=2). Find the probability that X is greater than 6 and less than 10.

Thanks!
]]>Probabilityhulahttp://www.talkstats.com/showthread.php/55049-Probability-that-a-normal-random-variable-lies-between-2-valuesContinuous probabibility distribution.
http://www.talkstats.com/showthread.php/55037-Continuous-probabibility-distribution.?goto=newpost
Tue, 15 Apr 2014 06:25:26 GMTPlease help me with this problem, I don't understand it pretty well.

The management of bidding of a company understands that the low bid X in certain type of project is a random variable with pdf given for: f (x) = 0.75C for 2C/3 <x <2C where C represents the cost of the project estimated by the management. Fnd the percentage that the management should add to its initial estimation of costs when they should send the bids, if they want to maximize his awaited profit.