Employee Productivity. A study of employee productivity is to be conducted with employees who enter data at computers. The amount of data entered is the dependent variable. Two factors that may influence the dependent variable are examined. One factor is the type of keyboard used (three types are available in the company). The second factor is the time of day (morning or afternoon). Four employees are randomly assigned to each type of keyboard. Two employees’ production levels are recorded for a period of 1 hour in the morning. The other two are recorded in the afternoon. The production level is the number of forms completely entered by each employee. These data are available in a file named PRODRAT9 on the CD. In the MINITAB file, there are three columns: NUMBER is the number of forms processed by each employee. KEYBOARD is the keyboard type (coded as 1, 2, or 3), and TIME is coded as 1 for morning and 2 for afternoon. In the Excel spreadsheet, the data will be set up for a two-way analysis of variance. See Using the Computer for more information.
Do the two factors, KEYBOARD and TIME, appear to influence production rate (NUMBER)? Use a 5% level of significance for any hypothesis tests used. State any hypotheses to be tested, the decision rule, the test statistic, and your decision. How would you describe the influence you observed in words?
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