Small slices of a data mart are called data warehouses.

Relational databases can be thought of as ________.

a) rows b) columns c) tables of rows and columns d) three-dimensional arrays

Given the set of cluster labels and similarity matrix shown in Tables 8.4 and 8.5, respectively, compute the correlation between the similarity matrix and the ideal similarity matrix, i.e., the matrix whose ijth entry is 1 if two objects belong to the same cluster, and 0 otherwise.