STAT 124 Study Guide - Midterm Guide: Box Plot, Stout, Point Estimation
Document Summary
5. 1 one-sample mean with the t-distribution 16. Key terms: statistical inference- methods for drawing conclusions about a population from sample data, collecting data from a sample and making an inference about the population from this sample, parameter-number that describes some characteristic of the population. In most cases, the value of the parameter is not known because we can"t examine the entire population: ex. Computing the mean of cell phone bill costs from of a sample of students in class. = population standard deviation x (with bar on top) = sample mean s = sample standard deviation. Sample standard deviation: s = (1/n-1) (xi x)2. Examples: parameter numbers: in 1991, statistics canada reported that the average age of canadian farmers was 47. 5 years old, while the average age in 2011 was 54 years old. Statistic numbers: you go to 10 randomly selected houses and weigh the material from the bins ready to be picked up.
