Table III. Statistics of resources...

Table III.

Statistics of resources generated by learners

Course	# registrants	# threads	# posts	Maximum # posts per thread	Average # posts per thread	# votes	# overall certificates (ratio)	P(C\|F)	P(F\|C)
peopleandnetworks-001	10,807	219	1,206	38	5.5	304	149 (0.013)	0.271	0.584
arthistory-001	16,395	273	2,181	124	8.0	1,541	237 (0.014)	0.272	0.620
dsalgo-001	13,197	283	1,221	36	4.3	266	57 (0.004)	0.180	0.930
pkuic-001	14,462	1,029	5,942	141	5.8	595	285 (0.020)	0.290	0.782
aoo-001	9,563	97	515	63	5.3	204	53 (0.006)	0.160	0.528
bdsalgo-001	852	319	1,299	48	4.1	132	248 (0.320)	0.853	0.774
criminallaw-001	8,190	118	763	58	6.5	648	–	–	–
orgchem-001	4,374	28	85	12	3.0	11	12 (0.004)	0.091	0.250
pkupop-001	18,410	1,085	6,443	92	5.9	977	205 (0.012)	0.255	0.780
chemistry-001	9,124	110	591	40	5.4	65	116 (0.013)	0.400	0.448
chemistry-002	6,782	167	715	92	4.3	678	125 (0.020)	0.336	0.336
pkubioinfo-001	18,367	361	2,139	201	5.9	1,474	581 (0.032)	0.362	0.370
pkubioinfo-002	16,714	170	942	51	5.5	235	510 (0.032)	0.571	0.212
Overall	147,237	4,259	24,042	–	–	–	–	0.309	0.508

Course	# registrants	# threads	# posts	Maximum# postsper thread	Average# postsper thread	# votes	# overall certificates(ratio)	P(C\|F)	P(F\|C)
peopleandnetworks-001	10,807	219	1,206	38	5.5	304	149 (0.013)	0.271	0.584
arthistory-001	16,395	273	2,181	124	8.0	1,541	237 (0.014)	0.272	0.620
dsalgo-001	13,197	283	1,221	36	4.3	266	57 (0.004)	0.180	0.930
pkuic-001	14,462	1,029	5,942	141	5.8	595	285 (0.020)	0.290	0.782
aoo-001	9,563	97	515	63	5.3	204	53 (0.006)	0.160	0.528
bdsalgo-001	852	319	1,299	48	4.1	132	248 (0.320)	0.853	0.774
criminallaw-001	8,190	118	763	58	6.5	648	–	–	–
orgchem-001	4,374	28	85	12	3.0	11	12 (0.004)	0.091	0.250
pkupop-001	18,410	1,085	6,443	92	5.9	977	205 (0.012)	0.255	0.780
chemistry-001	9,124	110	591	40	5.4	65	116 (0.013)	0.400	0.448
chemistry-002	6,782	167	715	92	4.3	678	125 (0.020)	0.336	0.336
pkubioinfo-001	18,367	361	2,139	201	5.9	1,474	581 (0.032)	0.362	0.370
pkubioinfo-002	16,714	170	942	51	5.5	235	510 (0.032)	0.571	0.212
Overall	147,237	4,259	24,042	–	–	–	–	0.309	0.508

Notes:P(C|F) represents the ratio of certificated forum learners to overall forum learners; P(F|C) represents the ratio of certificated forum learners to overall certificated learners of the course

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