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View Full Version : S1 Normal distribution mod problem


DelBoy
27th April 2006, 10:13 AM
i can do normal distribution problems but when it has a mod sign i am not sure how to start.

If the random variable X is distributed as N(5,4) calculate P(|X-5|>3).

IceMan
29th April 2006, 04:38 PM
|X-5|>3 => X-5 <-3 or X-5 >3 => X<2 or X>8

work out each probability and add or work out P( 2<X<8) and subtract from 1