The "curse of dimensionality" relates to which problem of using operational data for BI reporting? Non-integrated data Dirty data Too much data Inconsistent data TRUE ANSWER : ? YOUR ANSWER : ?
In OLAP, we are interested in ________ . dimensions only measures only measures and dimensions levels only TRUE ANSWER : ? YOUR ANSWER : ?
We have been given access to the company's operational data, and have been asked to produce a report. We discover that some of the data we need are in an SQL server database while other needed data are in a separate Oracle database. This is an example of ________ . a "wrong format" problem dirty data inconsistent data non-integrated data TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is an unsupervised data mining technique? Both Regression Analysis and RFM Analysis Regression Analysis only Cluster analysis only RFM Analysis only TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is not a reason that operational data are difficult to read? Missing values Non-integrated data Dirty data Non-duplicated data TRUE ANSWER : ? YOUR ANSWER : ?
Business Intelligence (BI) reporting systems cannot do which of the following operations? Modify data Filter data Both filter and group data Group data TRUE ANSWER : ? YOUR ANSWER : ?
RFM analysis uses customer's purchasing patterns to ________ . analyze and rank customers perform OLAP record transactions predict future sales using regression techniques TRUE ANSWER : ? YOUR ANSWER : ?
We have Market Basket data for 1,000 rental transactions at a Video Store. There are four videos for rent -- Video A, Video B, Video C and Video D. The probability that Video D will be rented given that Video C has been rented is known as ________ . support confidence the basic probability lift TRUE ANSWER : ? YOUR ANSWER : ?
Business Intelligence (BI) reporting systems are used to make sophisticated mathematical and statistical calculations in order to prepare reports based on the data. True False TRUE ANSWER : ? YOUR ANSWER : ?
We have Market Basket data for 1,000 rental transactions at a Video Store. There are for videos for rent -- Video A, Video B, Video C and Video D. The probability that both Video C and Video D are rented at the same time is known as ________ . lift the basic probability confidence support TRUE ANSWER : ? YOUR ANSWER : ?