Statistical Sciences 2037A/B Lecture Notes - Lecture 10: Simple Random Sample, Confidence Interval, Statistical Parameter

• School: Western University
• Department: Statistical Sciences
• Course: Statistical Sciences 2037A/B
• Professor: Jennifer Waugh

Document Summary

Estimating population parameters with corresponding sample versions (i. e. statistics) o. Parameters - characteristics of a population (e. g. mean, ; proportion, p) Statistics - characteristics of a sample (e. g. sample mean, x; proportion, ^p) Difference between a sample statistic and the population parameter, due to chance composition of the sample. Variation of a statistics from sample to sample due to chance composition of the sample: one sample might have 3 pink shirts and another sample might have 5-6. A frequency distribution of a statistic, based on all possible samples of the same size from a population. A frequency distribution of a parameter, based on all of the population. Properties of sampling distribution of x o. Considering a population with mean and standard deviation. An interval estimate of a population a parameter. Composed of: an interval calculated from the data, sample statistic --> estimate margin of error