This course website provides materials for teaching and learning path analysis. Materials include Regression Review, Introduction to Path Notation, Standardized Path Models, Unstandardized Path Models, Matrix Algebra, and many SAS programs.
This tutorial explains the theory and use of Multiple Regression and demonstrates it with an example on SAT scores and GPA. Data is given as well as SPSS and Minitab code.
This tutorial explains the theory and use of the Chi-Square Test for goodness of fit and demonstrates it with an example on mastery test scores. Data is given as well as SPSS and Minitab code.
HotBits is a genuine random number generator powered by radioactive decay. Simply click the "Request HotBits" link, and specify how many bytes you would like (up to 2048) and in what form you prefer them. Hexadecimal returns numbers and letters, while C language returns integers. Then click the "Get HotBits" button, and your random numbers will appear on the screen.
This dataset comes from a study of 26 healthy male subjects randomly assigned to a two-period crossover design. Patients were given either Drug A or Drug B, and data on plasma levels were collected. Questions from this study refer the similarity of the drugs. A text file version of the data is found in the relation link.
This dataset comes from a study of 8 healthy patients randomly assigned to a two-period crossover design. Patients were given 1 of 2 drug sequences and data on blood plasma levels wer recorded. Questions from this study refer how the drugs affect plasma levels. A text file version of the data is found in the relation link.
This dataset comes from a study of diabetic patients randomly assigned to a two-period crossover design. Patients were given 1 of 2 drug sequences (EN, NE) in each period and blood pressure was recorded. Questions from this study refer to the ability of the drugs to lower blood pressure. A text file version of the data is found in the relation link.
This dataset comes from a study of rats given one of 4 doses of a drug. The resulting pups were tested for developmental signs. Questions from this study refer to the relationship between dosage and developmental response. A text file version of the data is found in the relation link.
This dataset comes from a study of 90 rats given one of 3 doses of a drug. At sacrifice, data on body weight and the weights of various organs were collected. Questions from this study refer to the relationship between dosage and body and organ weight. A text file version of the data is found in the relation link.
This dataset comes from a study of 12 healthy males randomly assigned to a three-period crossover design, in which were given one of 3 doses of a drug. Blood samples were collected at specified time intervals, and data on plasma levels were collected. Questions from this study refer to the relationship between dosage and plasma levels. A text file version of the data is found in the relation link.
