# Session 3/12/15 Summary Report : cs 4786

 Question Title Time Started Time Stopped Number of Responses Maximum Score Average Score Date 3/12/15 Number of Students: 40 Total Questions: 7 Total Points Available: 8 Session Average: 2.98 Questions Asked: 10 Questions Deleted: 3 Participation Points Available: 1 Performance Points Available: 7 AP = Anonymous Polling.Session Average = Average calculation based only on students who voted in this session.Average Score per Question: Average calculation based only on students who responded to this question. k* for k-means 10:22:03 AM 10:22:24 AM 32 1.00 0.41 k* for normalized cut 10:28:17 AM 10:28:45 AM 31 1.00 0.74 k* for single-link 10:31:23 AM 10:32:18 AM 30 1.00 0.40 best stopping adaptation of single link 10:45:36 AM 10:46:27 AM 31 1.00 0.52 which properties, fixed-k single link 10:47:16 AM 11:10:20 AM 6 1.00 0.17 which properties, distance-a single link 11:10:36 AM 11:11:55 AM 29 1.00 0.72 which properties, fixed-k means 11:13:28 AM 11:14:05 AM 26 1.00 0.23

### k* for k-means

Answer # % Performance Points Correct Answer(s): D Number of Responses: 32 Class Average: 0.41 A = 1 1 3% 0 B = 2 1 3% 0 C = n - 1 2 6% 0 D = n 13 41% 1 E I don't know 15 47% 0

### k* for normalized cut

 Correct Answer(s): A Number of Responses: 31 Class Average: 0.74

### k* for single-link

 Correct Answer(s): B Number of Responses: 30 Class Average: 0.40

### best stopping adaptation of single link

Answer # % Performance Points Correct Answer(s): C Number of Responses: 31 Class Average: 0.52 A when no cross-clusters pairs with distance >= alpha 2 6% 0 B [...ditto] with distance <=alpha*(max inter-pair dist) 10 32% 0 C One is good, the other has inequality direction flipped 16 52% 1 D Both would be good if inequality directions flipped 2 6% 0 E What is single-link clustering? 1 3% 0

### which properties, fixed-k single link

Answer # % Performance Points Correct Answer(s): D Number of Responses: 6 Class Average: 0.17 A just richness 0 0% 0 B just scale invariance 1 17% 0 C just consistency 2 33% 0 D exactly 2 1 17% 1 E all 3 2 33% 0

### which properties, distance-a single link

 Correct Answer(s): D Number of Responses: 29 Class Average: 0.72

### which properties, fixed-k means

 Correct Answer(s): D Number of Responses: 26 Class Average: 0.23