STAT 203 Chapter 23 Inferences About Means
Let y be a variable that follows a certain distribution with mean and standard
deviation . If we have a large enough sample size n (> 30), and other necessary
conditions being satisfied, then the sampling distri
STAT 203 Chapter 7
Scatterplots, Association, and Correlation
A statistics instructor wishes to study the relationship between the number of classes students
skipped and their overall final grades. The data for nine randomly selected students from
STAT 203 Chapter 18 Sampling Distribution Models
Population vs. sample, parameter vs. statistic
Recall that a population contains the entire collection of individuals that one wants to
study, and a sample is a subset of individuals selected from a populat
STAT 203 Chapter 12 Sample Surveys
Why do we need sampling?
The complete collection of individuals under study is called the population. A census provides a means to obtain complete and accurate information about a population of interest.
However, it can