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  3. suppose x has a distribution with ? = 65 and ? = 9

Suppose x has a distribution with ? = 65 and ? = 9. (a) If random samples...

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Basic Math

Suppose x has a distribution with ? = 65 and? = 9.

(a) If random samples of size n = 16 are selected, canwe say anything about the x distribution of samplemeans?

No, the sample size is too small.Yes, the xdistribution is normal with mean ?x =65 and ?x =9.     Yes, the x distribution isnormal with mean ?x = 65 and?x = 0.6.Yes, the xdistribution is normal with mean ?x =65 and ?x = 2.25.

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

No, the sample size is too small.Yes, the xdistribution is normal with mean ?x =65 and ?x =2.25.     Yes, the x distributionis normal with mean ?x = 65 and?x = 9.Yes, the xdistribution is normal with mean ?x =65 and ?x = 0.6.


Find P(61 ? x ? 66). (Round your answer to fourdecimal places.)

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