Table 5.

Mann-Whitney U tests between low- and high-scoring samples for significant differences between sensor readings.

Sensor item	New use?	Low-scoring samplesa	High-scoring samplesb	Mann-Whitney U	P valuec
Plugged-in flag	No	55	83	1477.5	<.001
Battery level	No	64	135	4074.5	.51
User CPUd time	Yese	87	169	6916.0	.44
Idle CPU time	Yes	87	169	6818.0	.34
Total CPU time	Yes	87	169	6897.0	.42
User CPU percentage	Yes	80	153	5515.0	.22
User idle percentage	Yes	80	153	5537.0	.23
Available RAM	Yes	87	169	6386.0	.09
System uptime	No	121	189	9557.0	.006
Uptime with sleep	No	121	189	9524.0	.005
Pedometer step count	No	73	58	1564.0	.01
Pedometer distance	No	77	61	1738.0	.009
Pedometer floors up	No	77	61	1600.5	.001
Pedometer floors down	No	77	61	1617.5	.002
Pedometer 2 step count	No	13	10	51.0	.23
App use time	Yes	123	189	9082.0	.001
Survey time to complete	Yes	123	189	9678.0	.01
Resource panel time	Yes	123	189	11591.0	.76

^aTotal Smart Healthy Campus questionnaire score ≤ 24.

^bTotal Smart Healthy Campus questionnaire score >24.

^cP<.01 is considered significant.

^dCPU: central processing unit.

^eAnything 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.