Which of the following is the basic idea of the decision tree ...

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Which of the following is the basic idea of the decision tree technique?
 
  A) to perform an RMF analysis and rank consumers according to their purchasing patterns
  B) to select attributes that are most useful for classifying entities on some criterion
  C) to produce computer programs for information systems
  D) to use the minimum difference among groups created by the decision tree algorithm

Question 2

How are group totals created in Microsoft Access?
 
  What will be an ideal response?

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Answer to Question 1

B

Answer to Question 2

Open the relevant database, click the Create tab, click Query Design, and then select a
table for the query. After adding a table, click Close. Now add the fields to the query contents
table by double-clicking on them in the table diagram. Click the Totals button in the Show/Hide
section of the Design tab. In response, Microsoft Access adds a row labeled Total to the query
contents table. To group the rows by a particular field, select the keyword Group By in the Total
row under that field in the query contents table. To find the total of a field, select the keyword
Sum under the appropriate column. Run the query by clicking the large exclamation point in the
Results section of the Design ribbon.