Question: A study of employee productivity is conducted with employees who enter data at computers. The amount of data entered is the dependent variable. Two factors that may influence productivity are the type of keyboard used (KEYBOARD) of which there are three types and time of day (TIME). For the TIME variable, 1=morning and 2=afternoon. The dataset is saved as Productivity.

1. Do the factors type of keyboard and time of day and their interaction appear to influence productivity? Explain your answer by stating any hypotheses tested, the p-value and your conclusions.
2. Which level of the variable keyboard gives the greatest productivity? Explain.
3. Using the model with time and keyboard, but no interaction, form 95% Tukey intervals for the levels of keyboard type. Are any significantly different? If so which ones?
4. Repeat the analysis in part c, but remove the time factor from the analysis. Is there a difference in the results? Why?

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