Table 7.

Kruskal-Wallis tests for significant differences between sensor readings, including low- and high-scoring samples for both on- and off-campus students.

Sensor	New use?	Sample, n						Chi-square (df)		P value
		On campus			Off campus
		Low scoring	High scoring	Low scoring		High scoring
Plugged-in flag	No	14	53	28		14	32.3 (3)		<.001
Battery level	No	20	91	28		18	3.9 (3)		.27
User CPUa time	Yesb	34	103	44		48	0.9 (3)		.82
Idle CPU time	Yes	34	103	44		48	7.3 (3)		.06
Total CPU time	Yes	34	103	44		48	4.5 (3)		.22
User CPU percentage	Yes	34	94	37		42	18.1 (3)		<.001
User idle percentage	Yes	34	94	37		42	17.7 (3)		<.001
Available RAM	Yes	34	103	44		48	7.0 (3)		.07
System uptime	No	34	103	44		48	63.7 (3)		<.001
Uptime with sleep	No	34	103	44		48	68.9 (3)		<.001
Pedometer step count	No	19	20	28		34	1.9 (3)		.59
Pedometer distance	No	22	23	28		34	0.7 (3)		.88
Pedometer floors up	No	22	23	28		34	2.9 (3)		.41
Pedometer floors down	No	22	23	28		34	2.1 (3)		.55
Pedometer 2 step count	No	N/Ac	N/A	13		N/A	2.2 (3)		.33
App use time	Yes	34	103	44		48	42.3 (3)		.001
Survey time to complete	Yes	34	103	44		48	30.4 (3)		.001
Resource panel time	Yes	34	103	44		48	1.2 (3)		.75

^aCPU: central processing unit.

^bAnything marked with “Yes” was, to the best of the author’s knowledge in 2020, a new use of this sensor for this type of work.

^cN/A: not applicable.