If we use complete linkage, which two observations will merge into a cluster first (Drawing).单项选择题

题目图片
A

Points (1,3) and (3,3)

B

Points (1,3) and (9,10)

C

Points (3,3) and (9,10)

D

Points (11,12) and (9,10)

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This is a dissimilarity matrix that shows how far away each observation is from each other observation. As a reminder: this says that observations 1 and 2 are .15 away from each other. Using the agglomerative (hierarchical) method of creating clusters, if we use complete linkage, what is the first cluster of two observations to form? [选择] Observations 1 and 4 Observations 2 and 3 Observations 1 and 3 Observations 3 and 4 Observations 2 and 4 Observations 1 and 2 Using the agglomerative (hierarchical) method of creating clusters, if we use single linkage, what is the first cluster of two observations to form? [选择] Observations 2 and 3 Observations 1 and 4 Observations 1 and 3 Observations 3 and 4 Observations 1 and 2 Observations 2 and 4 .15 .4 .5 .15 .3 .55 .4 .3 .2 .5 .55 .2

This is a dissimilarity matrix that shows how far away each observation is from each other observation. As a reminder: this says that observations 1 and 2 are .15 away from each other. Using the agglomerative (hierarchical) method of creating clusters, eventually we reach a state in which there are only two clusters that remain (meaning there is either one cluster with three observations in it and one cluster with one observation in it, or there are two clusters of two observations). Using complete linkage, those two clusters are [选择] .55 .4 .2 .3 .5 .15 away from each other.  Using the agglomerative (hierarchical) method of creating clusters, eventually we reach a state in which there are only two clusters that remain (meaning there is either one cluster with three observations in it and one cluster with one observation in it, or there are two clusters of two observations). Using single linkage those two clusters are [选择] .3 .4 .55 .5 .15 .2 away from each other.  .15 .4 .5 .15 .3 .55 .4 .3 .2 .5 .55 .2

The table below shows how far each observation is from each other observation. It shows us that observation A is 1 away from Observation B, and that Observation C is 5 away from Observation D. Assume observations A and B are in a cluster and observations C and D are in a different cluster. If we use complete linkage how far is the cluster of A and B from the cluster of C and D?  Observation A Observation B Observation C Observation D Observation A 1 6 3.5 Observation B 1 5.5 7 Observation C 6 5.5 5 Observation D 3.5 7 5  

In a hierarchical clustering dendrogram, what does the y-value of the link between two clusters represent?

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