Table 2 Average daily openings of the refrigerators’ doors
| Refrigerator 1 | Refrigerator 2 | Refrigerator 3 | Refrigerator 4 | Refrigerator 5 | Refrigerator 6 | Refrigerator 7 | |
|---|---|---|---|---|---|---|---|
| Average daily openings (over an 8-month period) | 8 (4.85) | 15 (10.35) | 16 (8.52) | 18 (12.05) | 12 (6.33) | 15 (9.37) | 26 (17.19) |