STAT200 Chapter Notes - Chapter 1-4: Percentile Rank, Royal Institute Of Technology, Quartile

• School: University of Delaware
• Department: Statistics
• Course: STAT200
• Professor: Dianne Sisofo

Document Summary

Study guide for chapter 1 and chapter 4 topics. A population consists of all the subjects, items, objects, etc. being studied. A sample is a representative subset of the population. A parameter is a characteristic or a measure of interest of a population. For example: is the mean of a population. A statistic is a characteristic or a measure of interest of a sample. For example: is the mean of a sample. The sample mean is used to estimate the population mean . The population parameters are unknown, therefore a random sample is chosen from the population of interest and sample statistics are calculated. The calculated sample statistics are used to estimate the values of the unknown population parameters. The sample variance s2 is used to estimate the population variance 2. The number of data values that fall within the defined class.