Given, = 3340 , = 660
using central limit theorem,
P( < x) = P( Z < x - / / sqrt(n)
P(3300 < < 3400) = P( < 3400) - P( < 3300)
= P( Z < 3400 - 3340 / 660 / sqrt(900) ) - P( Z < 3300 - 3340 / 660 / sqrt(900) )
= P( Z < 2.7273) - P (Z < -1.8182)
= 0.9968 - 0.0344
= 0.9624
solve Problem 16 section a) (Page 245), According to the Nielsen Company, teenagers between the ages...