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Table 3 Coefficient of variation for average duration of performance

From: Harnessing smartphone technology and three dimensional printing to create a mobile rehabilitation system, mRehab: assessment of usability and consistency in measurement

Activity Name* Average duration in seconds (Standard Deviation) % Coefficient of Variation (SD)
Day 1 Day 2 Day 3
Vertical bowl 4.3 (0.29) 4.6 (1.0) 4.2 (0.4) 9.2 (8.9)
Horizontal bowl 4.4 (0.7) 4.2 (0.5) 4.3 (0.7) 11.1 (7.5)
Vertical mug 4.2 (0.55) 4.2 (0.41) 4.1 (0.47) 7.7 (5.3)
Horizontal mug 4.5 (0.85) 4.1 (0.36) 4.4 (0.53) 9.9 (7.3)
Sip from mug 10.0 (0.95) 10.2 (0.86) 10.2 (0.84) 6.3 (5.2)
Quick twist mug 1.4 (1.1) 1.6 (1.1) 2.3 (2.6) 46.2 (31.4)
Slow pour 19.8 (2.6) 19.4 (1.1) 19.1 (1.0) 6.8 (4.9)
Phone number 9.4 (1.3) 9.3 (1.5) 8.8 (0.9) 9.0 (6.0)
Quick tap 5.4 (1.3) 6.2 (0.6) 6.0 (0.7) 10.8 (13.5)
  1. *Note: Walk with the mug is not included in this table, as the duration of 1 repetition was fixed to be 10 s