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Table 5 Configuration and price information of the final study

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

Data Number of HITs 27
  Number of assignments per HIT 5
  Reward per assignment $0.5
Estimated Cost Total reward per HIT $2.5 (=5×$0.5)
  Fees to Mechanical Turk per HIT $0.5 (=5×$0.1)
  Total cost per HIT $3.0 (=$2.5+$0.5)
  Total cost for 27 HITs $81.0 (=$27×$3.0)
Actual Cost Assignments done and approved 135 (=27 HITS ×
    5 assignments)
  Total cost $81.0