STATS 7 Lecture Notes - Lecture 9: Statistical Parameter, Statistic, Random Variable
Document Summary
A group of n units taken from a larger population. Describes how a random variable varies across all possible values. How the values in a population vary. How the values in a sample vary. The process of taking many many samples (or all possible samples) from a large population. The probability distribution of possible values of a sample statistic for repeated samples of the same size from a population. Making conclusions about population parameters on basis of sample statistics. An interval of values that the researcher is fairly sure will cover the true, unknown value of the population parameter. Uses sample data to attempt to reject a hypothesis about the population. P = proportion of the population of all us households with tvs that watched it. Nielsen ratings, random sample of n = 25000 households. X= number in sample who watched the show = 11510. P -hat = x/n = 11510/25000 = 0. 46 = proportion of sample who.
