STA-1013 Lecture Notes - Lecture 8: Statistic, Sampling Distribution, Standard Deviation
Document Summary
Sampling distribution: sample, sample statistics, population, population parameter, 2 statements. The mean daily protein consumption by americans is 67 grams. (mean) About 5% of all american children live with a grand-parent. (proportion: sample means, the distribution of any sample statistic from all possible samples of a particular size is called a sample distribution, example. N=2: we can choose same child twice: characteristics of distribution of sample mean. The larger the sample size, the more closely the distribution of the sample means approximate normal. The mean of the distribution of sample means equals the population mean. The standard deviation of the sample means is /square root of n. N=sample size: characteristics of distribution of sample proportions for any distribution of sample means. The larger the sample size, the more closely the distribution of the sample proportion approximate normal. The mean of the distribution of sample proprotions equals the population proportion.
