Complete SAS Programming Guide - Learn SAS and Become a Data Ninja - Selecting Variable(s) for Your Index

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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important to be selective about which variables you create an index on in SAS?
Indexes consume resources and take up disk space.
Indexes are automatically created for all variables.
Indexes are always beneficial regardless of the variable.
Indexes do not consume any resources.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a key consideration when choosing a variable for a composite index?
The variable should be a text field.
The variable should be numeric.
The variable should be frequently used for subsetting.
The variable should be rarely used.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does it mean for a variable to be discriminant in the context of SAS indexing?
It selects a large portion of the data set.
It selects a very specific small set of observations.
It is used for sorting data.
It is a variable with many unique values.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a good candidate for a discriminant variable?
Social Security number
Patient ID
Age
Employee ID
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What frequency range indicates a good candidate for indexing?
16 to 20%
21 to 25%
26 to 30%
1 to 15%
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