1. Each of three turners was given one trade test on four different lathes. The results were recorded in the table below (number of pieces produced in an 8-hour shift). 2. (i) Are there any...

1. Each of three turners was given one trade test on four different lathes. The results were recorded in the table below (number of pieces produced in an 8-hour shift).

2.

(i) Are there any significant differences among turners in the trade test? (ii) Are there any significant differences among lathes as these machines react to turner skill? Assume that turners react psychologically differently to the specific machines.