The manager of a company suspects that the production of gadgets varies depending on the shift in which it is produced. It measures production according to the work shift: day shift, evening shift and night shift. He takes this measurement every day for 30 days.

For the day shift, the number of gadgets over 30 days is: 141, 155, 147, 178, 135, 148, 152, 151, 170, 156, 133, 144, 149, 155, 135, 138, 141, 148, 145, 151, 139, 155, 147, 147, 146, 152, 151, 137, 165, 162.

For the evening shift, the number of gadgets over 30 days is: 139, 148, 137, 147, 146, 133, 120, 129, 111, 146, 180, 103, 172, 121, 117, 119, 128, 137, 129, 141, 138, 138, 140, 152, 127, 136, 111, 137, 146, 155.

For the night shift, the number of gadgets over 30 days is: 90, 85, 75, 82, 101, 75, 82, 77, 81, 96, 94, 83, 88, 105, 69, 77, 78, 94, 99, 76, 92, 81, 80, 72, 68, 95, 100, 83, 84, 68.

Use SPSS software to do the relevant analysis and to answer the manager's question. Make sure you do full analysis of your results. Interpret.