Suppose x has a distribution with μ = 70 and σ = 9. (a) If random samples of size n = 16 are selected, can we say anything about the x distribution of sample means?
No, the sample size is too small. Yes, the x distribution is normal with mean μ x = 66 and σ x = 1.5. Yes, the x distribution is normal with mean μ x = 66 and σ x = 6. Yes, the x distribution is normal with mean μ x = 66 and σ x = 0.4. (b) If the original x distribution is normal, can we say anything about the x distribution of random samples of size 16? Yes, the x distribution is normal with mean μ x = 66 and σ x = 0.4. Yes, the x distribution is normal with mean μ x = 66 and σ x = 1.5. No, the sample size is too small. Yes, the x distribution is normal with mean μ x = 66 and σ x = 6.. Find P(62 ≤ x ≤ 67). (Round your answer to four decimal places.)
