1. The incomes of trainees at a local factory are normally distributed with a mean of $1 100 and a standard deviation of $150. What is the probability the mean salary of 10 randomly selected trainees is more than $1000 a month? P (xz 1,000 = normalEdf L1:000, Eqq, , 1100, M= 1, 100 4 = 150 n= 10 2. Assume that women's heights are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. If 20 women are randomly selected, mz 63.6 d= 2.5 n= zo (a) find the probability that they have a mean height between 62.5 inches and 64.5 inches. (b) find the probability that they have a mean height less than 62.5 inches or more than 64.5 inches. a ) P ( 6 215 2 x 6 69. 5) = normal ColF ( 42. 5, 64. 5, 43.6, 2.5/120 )