Question

a.) Assume that x has a normal distribution. Find P(10 ≤ x ≤ 26) given that μ = 14.9 and σ = 4.0. (Use 4 decimal places.)

b.) Let z be a random variable with a standard normal distribution. Find P(–1.13 ≤ z ≤ 2.47). Use 4 decimal places.

c.) Consider a normal distribution with mean 25 and standard deviation 5. What is the probability that a value selected at random from this distribution is greater than 25? (Use 2 decimal places.)

d.) Assume that x has a normal distribution. Find P(3 ≤ x ≤ 6) given that μ = 4.6 and σ = 2.3. (Use 4 decimal places.)

Answer 1