Question 871666
The mean is 120, the standard deviation is 9.75, and N=1000.
P(x > 136), z = 1.641
P(z > 1.641) = 5.04%  Unusual (only 5% of people higher)
n = 5,  s  = 9.75/sqrt(5) = 2.236
P(x > 136),  z = 16/2.236 = 7.1556 , P(z > 7.1556) is basically zero, UNUSUAL