Table 8.

Mean ranks for sensor items with significant differences, low-scoring versus high-scoring questionnaire response scores, on campus and off campus.

Significant sensor item	Mean rank
	On campus			Off campus
	Low-scoring	High-scoring	Low-scoring		High-scoring
Plugged in	48.71	41.79	77.36		66.57
User CPUa percentage	86.44	98.71	140.76		97.67
User idle percentage	121.74	109.13	67.68		110.17
Uptime	117.32	80.78	156.07		149.14
Uptime with sleep	116.54	79.46	156.95		151.71
App use time	112.79	143.72	94.66		73.58
Survey time to complete	95.91	138.65	113.98		78.71

^aCPU: central processing unit.