This lesson introduces simple linear regression with several Excel spreadsheet examples such as temperature versus cricket chirps, height versus shoe size, and laziness versus amount of TV watched. These activities require class participation.
This applet shows a scatterplot of height versus foot length. Users can add or delete points and then guess the regression line by clicking "Your Line" and moving the blue regression line. By clicking "Regression Line" users can see the actual regression line. The applet also shows the correlation and R-square for the data as well as the residuals and squared residuals for the guessed regression line and the actual regression line.
This page contains applets and data files that supplement the text "Investigating Statistical Concepts, Applications, And Methods." The applets and files are organized according to chapter; each data file is available in Minitab or text format.
The datasets in this collection are in text format, but are also compatible with Arc software from "Regression Graphics." Each set has a title, description, and data table. The software is available in the relation link below.
This dataset comes from a study of 100 mice assigned randomly to one of five treatment groups of graded dosages of a drug. They were also given an injection of another drug, and sleeping times were recorded for each mouse. Questions from this study refer to the relationship between sleeping times and dosage. A text file version of the data is found in the relation link.
This dataset comes from a study of rodents treated with one of 5 or 6 doses of a drug. The proportion of animals that died were recorded. Questions from this study refer to estimating the lethal dosage. A text file version of the data is found in the relation link.
This dataset comes from a study of 10 mice treated with one of 3 doses of a drug. Bone marrow cells were examined and the number of sister chromatid exchanges was recorded for each mouse. Questions from this study refer to the relationship between dosage and chromatid exchange. A text file version of the data is found in the relation link.
This dataset comes from a study of 23 healthy male subjects in a five period crossover study. Each subject followed a randomly allocated sequence of five treatments. Blood samples were collected and serum ethanol levels were recorded. Questions from this study refer to the drug-alcohol interaction. A text file version of the data is found in the relation link.
This dataset comes from a study of 22 female subjects randomly allocated to 1 of 2 oral contraceptive treatment sequences in a 2 period crossover design. Blood samples were collected at specific time intervals and plasma levels were recorded. Questions from this study refer to the interaction of the two treatments. A text file version of the data is found in the relation link.
