Finite math

Question

If x is a normally distributed random variable With a mean of 7.1 and a standard deviation Of 1.1. Find pr[x< or equal to 5.8] 

Answer 1

Z= 5.8-7.1/1.1 = -1.3/1.1= -1.18

 

less than or equal is the area below z

find the area in the table corresponding to z=-1.18

 

the area is .1190

 

so pr(x< or =5.8) = .1190