Inference for One Population Mean
There are many parameters that define a population. We will first concentrate on the population
mean. The sample mean or average X is a point estimate of the population mean . The
sample variance s2 is a point estimate fo
Quick SAS Introduction
SAS (Statistical Analysis System) is a powerful statistical package used for analyzing and
organizing statistical data, from small to very large data sets in many different fields. SAS can
print out summaries of data, draw gr
Manipulating and Displaying Data Sets
After we have initially created a SAS data set from a raw data file, there are many tasks that we
may need or want to perform before it is ready for analysis. These include:
Sorting the data
Combining data sets by row
Before we perform statistical analysis with SAS, we need to determine the following:
1. What do we need to do?
2. What do we need SAS to do?
3. What does SAS need from us?
For example, suppose we want to perform a one-sample t-test.
Data Set Examples
1. For undergraduate students, one F (grade < 60) means they get a warning. If they get
three, they are put on probation. The fourth F means expulsion. Students with no Fs are
in good standing.
For graduate students, one C (grade < 80) m