Table 3: Average rate of contributions made by developers and non developers.

Variable Contributions Participants
Dev.Non dev. Dev.

Apache Ant
bugs reported 29.70 509.30 6.30 377.40
bug comments 681.50 416.01 11.30 248.90
emails 4,773.91 5,628.00 14.54 284.91

Apache Lucene
bugs reported 141.11 156.77 8.66 91.33
bug comments 507.11 241.33 10.77 95.33
emails 3,547.00 5,745.66 13.66 173.22

Apache Maven
bugs reported 204.87 268.25 11.00 165.00
bug comments 569.28 334.28 13.85 195.14
emails 4,328.37 9,505.75 13.37 260.87

Apache Solr
bugs reported 201.10 265.60 10.20 116.00
bug comments 819.03 432.80 11.00 166.60
emails 1,808.25 6,047.75 9.00 112.50