Chapter 6
Modifying and Combining SAS Data Sets
Multiple Choice
1. The data sets APR, MAY, and JUN have one observation for each day in the corresponding month. How many observations will be in the resulting data set called MONTHS?
DATA months;
SET apr may jun;
RUN;
a. 0
a. 30
b. 60
c. 91
2. Which statement is required when interleaving data sets but not when stacking data sets?
a. SET
b. BY
c. MERGE
d. UPDATE
3. Suppose the SAS data sets called ONE and TWO contain the following data. How many observations will be in the resulting SAS data set called FIRST?
ONE
|
ID |
Date |
|
123 |
12/31/2013 |
|
456 |
09/15/2014 |
TWO
|
ID |
Date |
|
123 |
05/04/2014 |
|
123 |
06/22/2014 ... |
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