# BUEC 232 Lecture Notes - Lecture 13: Standard Score, Sampling Distribution, Standard Deviation

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###### BUEC 232 Full Course Notes

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Sampling and sampling distributions part 2: please sit i(cid:374) pairs for to(cid:374)ight"s le(cid:272)ture, a(cid:374)d ha(cid:448)e a te(cid:454)t(cid:271)ook a(cid:448)aila(cid:271)le, recap: 2: sampling is without replacement from an infinite population: note that the standard error of the mean decreases as the sample size increases, recap: If a population is normal with mean and standard deviation , then the sampling distribution of is also normally distributed with and. Z-value for a point on the sampling distribution of : determining the probability: exercise, quick algebra, determining an interval including a fixed proportion of the sample means: exercise. Assume the distribution of sample means is normal. Find a symmetrically distributed interval around that will include 95% of the sample means when = If the population is not normal: even if the population is not normal, For any distributions, n > 30 will give a sampling distribution that is nearly normal.