Question

Suppose x has a distribution with μ = 75 and σ = 8. (a) If random...

Suppose x has a distribution with μ = 75 and σ = 8.

(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 μx = 75 and σx = 0.5.    Yes, the x distribution is normal with mean μx = 75 and σx = 2.Yes, the x distribution is normal with mean μx = 75 and σx = 8.


(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 μx = 75 and σx = 2.No, the sample size is too small.    Yes, the x distribution is normal with mean μx = 75 and σx = 8.Yes, the x distribution is normal with mean μx = 75 and σx = 0.5.


Find P(71 ≤ x ≤ 76). (Round your answer to four decimal places.)

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