OC-2-KB: integrating crowdsourcing into an obesity and cancer knowledge base curation system

Table 7 Time spent by the workers over the 27 HITs

	Time spent on HITs
Time	≥ 0 s	≥ 300 s	≥ 750 s
min	43	332	761
max	2095	2095	2095
\(\overline {x}\)	1,001.21	1,255.35	1,421.11
σ	638.27	495.58	382.54
Number of assignments completed ^∗	5734	4413	3770

^*The number assignments completed within the time range. Note that, there were 27 HITs, and each HIT was completed by 5 workers. Thus, there are a total of 135 assignments (27 HITs times 5 workers)

ISSN: 1472-6947