Question

Suppose x has a distribution with μ = 22 and σ = 20.

(a) If random samples of size n = 16 are selected, can we say anything about the x distribution of sample means?

Yes, the x distribution is normal with mean μ _x = 22 and σ _x = 1.3

No, the sample size is too small.

Yes, the x distribution is normal with mean μ _x = 22 and σ _x = 5

Yes, the x distribution is normal with mean μ _x = 22 and σ _x = 20.

(b) If the original x distribution is normal, can we say anything about the x distribution of random samples of size 16?

No, the sample size is too small

Yes, the x distribution is normal with mean μ _x = 22 and σ _x = 1.3

Yes, the x distribution is normal with mean μ _x = 22 and σ _x = 20

Yes, the x distribution is normal with mean μ _x = 22 and σ _x = 5

(c) Find P(18 ≤ x ≤ 23). (Round your answer to four decimal places.)

Answer 1