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Wednesday, January 27, 2010

Q2

The SASDATA.BANKS data set has five observations when the following SAS program is submitted:

libname sasdata 'SAS-data-library';

data allobs;
set sasdata.banks;
capital=0;
do year = 2000 to 2020 by 5;
capital + ((capital+2000) * rate);
output;
end;
run;

How many observations will the ALLOBS data set contain?

A. 5
B. 15
C. 20
D. 25

8 comments:

SASGuru said...

Answer D

Banks has 5 obs and then the do loop outputs for (20/5 + 1) times. Therefore 5*(20/5 + 1) is the observation count

Rujuta........ said...

D. 25

Unknown said...

CAn you pls explain SASGuru why is it not 5+5=10?

siva said...

Answer D
per rate its caleculated 5 times.
data banks;
input rate;
datalines;
2
4
8
9
10
;
run;

data allobs;
set banks;
capital=0;
do year = 2000 to 2020 by 5;
capital + ((capital+2000) * rate);
output;
end;
run;

smita said...

This is the output what you get after running

Obs rate capital year
1 2 4000 2000
2 2 16000 2005
3 2 52000 2010
4 2 160000 2015
5 2 484000 2020
6 4 8000 2000
7 4 48000 2005
8 4 248000 2010
9 4 1248000 2015
10 4 6248000 2020
11 8 16000 2000
12 8 160000 2005
13 8 1456000 2010
14 8 13120000 2015
15 8 118096000 2020
16 9 18000 2000
17 9 198000 2005
18 9 1998000 2010
19 9 19998000 2015
20 9 199998000 2020
21 10 20000 2000
22 10 240000 2005
23 10 2660000 2010
24 10 29280000 2015
25 10 322100000 2020

Ryan Lo said...

Answer is D.

SASDATA.BANKS has 5 obs and then the DO loop outputs for 5 (2000, 2005, 2010, 2015, 2020) times. Therefore 5 * 5 = 25 observations output to the ALLOBS.

Gaurav Verma said...

D

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