Explain how it is possible for women to get paid more than men in every department in a company and at the same time for men to have the higher mean salary when computed for the whole company. Discuss the relative advantages and disadvantages of the various methods for testing effects in these designs. For the following data, predict Y from X. Compute Pearson's r, the correlation between predicted and observed, the correlation between residuals and observed. There are five subjects in each of the six cells. After training, each subject is tested and receives a score on how well he or she mastered the material.
Higher scores represent better performance.
IQ scores are also available for each subject. Analyze the following data and write a results section. Make up a small dataset for which the slope of a variable is positive and the partial slope is negative. The analysis given in the back of the book shows no significant effect of experience. Using the dataset strength.xls , develop and cross validate a regression model predicting age from the other variables.