STAT 4110 Exam 1 (SAS)
@ is used when there is more than one observation per line in the data file.b T/F
False
The IF statements are generally more efficient than subsetting WHERE statement.
False
The following sample codes (a) and (b) are the same format: T/F (a) INPUT x1 5. x2 5. x3 5. (b) INPUT (x1-x3) (5*3.)
False
When you use IF statement, THEN and/or ELSE statement should be used at all times. T/F
False
This statement instructs SAS to go to the beginning of the step. What is the name of the statement?
Return
FIRSTOBS=n
Tells sas to start reading at observation n
OBS=n
Tells sas to stop reading observations at observation n
DROP=Variable(s)
Tells sas which variables to drop
KEEP=variable(s)
Tells sas which variables to keep
#5 from the program below in INPUT statement means move to column 1 of the fifth line of data. T/F DATA two; INPUT name $15. #5 @21 zip; CARDS; William Smith Box 1234 Raleigh, NC 27607 Fred Jones Rt #1 Zebulon, NC 27597
True
When DO statement is used in a program, it should have END statement to let SAS know the DO loop is done. T/F
True
The DO UNTIL statement executes a group of statements repetitively until the condition that you specify is true. The condition is checked _______ each iteration of the loop.
after
In SAS, _ERROR_, _N_, etc variables are called ________variables.
automatic
The DO WHILE statement executes a group of statements repetitively as long as the condition that you specify remains true. The condition is checked ________ each iteration of the loop.
before
The _ERROR_ variable can be used in expressions or calculations in the ________ step.
data