Find Pl Xu l 215 normal distribution If X N 25 a normal di

Find P(l X-u l < 2.15) normal distribution

If X ~ N(, 25) (a normal distribution with mean and variance 2 -25), find PCI X- |

Solution

P( x - miu < 2.15 )

using tables we will find the probability

P ( z < 2. 15 / srqt 25 )

P( z < 0.43 ) = 1 - P( z > 0.43)

P( z < 0.43) = 1 - 0.3336 = 0.6664