The results shown below are mean productivity measurements (average number of assemblies completed per hour) for a random sample of workers at each of three plants. Research question: Are the mean hourly productivity levels the same for workers in these three plants?

Transcribed Image Text:

Hourly Productivity of Assemblers in Plants Plant A (9 workers) 3.6 5.1 2.8 4.6 4.7 4.1 3.4 2.9 4.5 C (10 workes 6.8 2.5 54 6.7 4.6 3.9 54 4.9 7.1 8.4 Finished Units Produced per Hour a B (6 workers 2.7 3. 5.0 19 22 3.2