Final Exam. STT 305 Summer 2017

Transcription

1 Final Exam STT 305 Summer 2017

2 Question 1 For the text file and code given at the right, which is the correct data set? Answer A Here Answer B Here Figure Answer C Here No data set is produced, the input line contains a syntax error: reading the same column more than once.

3 Question 2 For the code at the right, what is the value of the variable result? Mr. Mr M No value: Syntax Error Mr. John Doe Question 3 For the code at the right, what is the value of the variable result? Mr. M No value: Syntax Error Mr Mr. John Doe

4 Question 4 For the code at the right, what is the value of the variable result? John Mr Mr. No value: Syntax Error John Doe Question 5 For the code at the right, what is the value of the variable result? John Mr. No value: Syntax Error Mr John Doe

5 Question 6 When a format is present, it is utilized to define categories for which of the following? Variables listed in the TABLE statement in PROC FREQ. Variable named in the GROUP= option in HBAR in PROC SGPLOT A or B only Columns in PROC REPORT with GROUP as an option in their DEFINE statement Any of A, B or C Question 7 In the statement: ods output name1 = name2; The correct roles and definitions of the names are: name1 is the name of the output table, name2 is for the data set created from it name1 is the name of the data set created, name2 is the name of the output table name1 is the file type (PDF, RTF, HTML) and name2 is the file name (with extension) A and C are both correct. None of the above

6 Question 8 For the code at the right, what line would correctly limit the data set to those observations with a value of mpg_combo of 25 or more? if combo_mpg ge 25; if combo_mpg gt 25; Either A or B where combo_mpg ge 25; keep combo_mpg ge 25; Question 9 For a variable named date that is stored as a SAS date, which of the following statements would correctly select observations from 2001 in a general SAS procedure? where date between '01/01/2001'd and '12/31/2001'd; where date between '01JAN2001'd and 31DEC2001'd; None of the above if date between '01/01/2001'd and '12/31/2001'd; if date between '01JAN2001'd and 31DEC2001'd;

7 Question 10 For the text file and SAS data set given at the right, which code correctly produces the data set from the text file? data codes; run; infile 'Data2.txt'; input region $ 1-4 id $ 5-7; Code=cats(region,'-',id); drop region id; data codes; run; infile 'Data2.txt'; input region $ 1-4 id $ 5-7; Code=catx('-',region,id); drop region id; Figure data codes; run; infile 'Data2.txt'; input region $ 1-4 id $ 5-7; Code=cat(region,'-',id); drop region id; Any of A, B or C.

8 Question 11 For the code at the right, the use of the rename option is part of: A syntax error Both a syntax error and logic error A logic error None of the above Question 12 For the code at the right, the $ preceding the name codes is: A syntax error Both a syntax error and logic error A logic error None of the above

9 Question 13 For the text file and SAS code given at the right, which of the choices below properly completes the infile statement? dlm='09'x firstobs=2 dsd firstobs=2 Figure dlm=',' firstobs=1 None of the above

10 Question 14 For the text file and SAS code given at the right, which of the choices below properly completes the last column for the input statement? Hired:mmddyy. Hired:date. Figure Hired:date9. None of the above

11 Question 15 For the text file and SAS code given at the right, which of the choices below to fill in the last statement would be a reasonable way to get the hire date to display well (assuming it was read correctly)? format Hired mmddyy10.; format Hired date9.; Figure format Hired weekdate.; Any of the above

12 Question 16 For the SAS code given at the bottom right, which data step uses a correct and equivalent select block? data states_new; set states; select(st); when(upcase('va')) then state='virginia'; when(upcase('nc')) then state='north Carolina'; when(upcase('sc')) then state='south Carolina'; otherwise state='other'; end; run; data states_new; set states; select(upcase(st)); when('va') then state='virginia'; when('nc') then state='north Carolina'; when('sc') then state='south Carolina'; otherwise state='other'; end; run; data states_new; set states; select(upcase(st)); when('va') state='virginia'; when('nc') state='north Carolina'; when('sc') state='south Carolina'; otherwise state='other'; end; run; Any of A, B or C.

13 Question 17 For the SAS code given at the bottom right, which of the following is correct? There is a syntax error that can be fixed by placing an end statement at the conclusion of the if-then-else chain. There is a truncation problem on state that can be fixed by placing an appropriate length statement after the if-then-else. There is a truncation problem on state that can be fixed by placing an appropriate length statement before the if-then-else. Either B or C will work.

14 Question 18 For the SAS code given at the bottom right, which of the following is a correct modification to send records out to four separate data sets corresponding to each condition? data states_new; set states; if upcase(st)='va' then output Virginia; else if upcase(st)='nc' then output NorthCarolina; else if upcase(st)='sc' then output SouthCarolina; else output Other; run; data Virginia NorthCarolina SouthCarolina Other; set states; if upcase(st)='va' then output 'Virginia'; else if upcase(st)='nc' then output 'NorthCarolina'; else if upcase(st)='sc' then output 'SouthCarolina'; else output 'Other'; run; data Virginia NorthCarolina SouthCarolina Other; set states; if upcase(st)='va' then output Virginia; else if upcase(st)='nc' then output NorthCarolina; else if upcase(st)='sc' then output SouthCarolina; else output Other; run; Either B or C will work.

15 Question 19 For the graphs given at the right, which statement correctly modifies the first to match the second? xaxis title='revenue (x $1,000,000,000)' minorcount=1 minor; xaxis label='revenue (x $1,000,000,000)' minorcount=1 minor; xaxis title='revenue (x $1,000,000,000)' minor; xaxis label='revenue (x $1,000,000,000)' minorcount=1; xaxis / label='revenue (x $1,000,000,000)' minorcount=1;

16 Question 20 For the graphs given at the right, which statement correctly modifies the first to match the second? yaxis display=(nolabel noticks) labelattrs=(bold); yaxis display=(nolabel noticks) valueattrs=(bold); yaxis display=(nolabel noticks) labelattrs=(weight=bold); yaxis display=(nolabel noticks) valueattrs=(weight=bold); yaxis / display=(nolabel noticks) valueattrs=(bold);

17 Question 21 For the graphs given at the right, which statement correctly modifies the first to match the second? keylegend position=topleft title=' ' noborder; keylegend position=topleft title=' ' noframe; keylegend position=topleft title=none noborder; keylegend position=top location=left title=' ' noborder; keylegend / position=topleft title=' ' noborder;

18 Question 22 For the graphs given at the right, which statement correctly modifies the first to match the second? styleattrs datacolors=(blue orange); styleattrs datacolors=(orange blue); styleattrs datacontrastcolors=(orange blue); styleattrs datacontrastcolors=(blue orange); styleattrs / datacontrastcolors=(blue orange);

19 Question 23 For the graphs given at the right, which statement(s) correctly modifies the first to match the second? title j=right h=14pt 'Diastolic Blood Pressure'; title2 j=right 'Across Cholesterol Level'; title j=right height=14pt 'Diastolic Blood Pressure'; title2 j=right 'Across Cholesterol Level'; title justify=right h=14pt 'Diastolic Blood Pressure'; title2 justify=right 'Across Cholesterol Level'; title justify=right height=14pt 'Diastolic Blood Pressure'; title2 justify=right 'Across Cholesterol Level'; Any of the above

20 Question 24 Which color specification is closest to white? gray11 graycc cxeeeeee gray99 gray Question 25 Which of the following is true for all SAS names, including: variable names, data set names, library names and format names? They are permitted to include letters, numbers and underscores. They must not begin with a number. They can be up to 32 characters long. A and B are both correct. A and C are both correct.

21 Question 26 For the SAS output given on the next page, which report is most likely to have created it? Title 'Blood Pressure'; proc report data=bp; column chol_status weight_status diastolic systolic; define chol_status / group width=14; define weight_status/group; define diastolic / mean; define systolic / mean; break after chol_status / summarize ol skip suppress; run; Title 'Blood Pressure'; proc report data=bp headline; column chol_status weight_status diastolic systolic; define chol_status / group width=14; define weight_status/group; define diastolic / mean; define systolic / mean; break after weight_status / summarize ol skip suppress; run; Title 'Blood Pressure'; proc report data=bp headline; column chol_status weight_status diastolic systolic; define chol_status / group width=14; define weight_status/group; define diastolic / mean; define systolic / mean; break after chol_status / summarize ol skip suppress; run; Title 'Blood Pressure'; proc report data=bp headline; column chol_status weight_status diastolic systolic; define chol_status / group width=14; define weight_status/group; define diastolic / mean; define systolic / mean; rbreak after chol_status / summarize ol skip suppress; run;

22 Question 26--Continued SAS output for question 26.

23 Question 27 To modify the SAS output on the left to that on the right...

24 Question 27--Continued which format is correct (assuming it is used in the define statement for chol_status)? proc format; run; value $status 'Desirable'='Good' 'High'='Not Good' 'Borderline'='Not Good' ; proc format; run; value $status 'Desirable'='Good' 'High','Borderline'='Not Good' ; proc format; run; value $status 'Desirable'='Good' other='not Good' ; Any of the above

25 Question 28 To modify the SAS output on the left to that on the right...

26 Question 28--Continued which is correct? Add the option format=9.2 to the define statement for systolic and for diastolic Add the option format=6.2 to the define statement for systolic and for diastolic Add the option format=6.2 to the define statement for systolic and format=5.2 for diastolic Any of the above

27 Question 29 For the code at the right, what additional statement would preserve only matched records? where inone and intwo; if inone and intwo; where inone or intwo; if inone or intwo; Question 30 For the code at the right, which statements correctly add a variable indicating which data set each record originates from? if inone then from='one'; else from='two'; if inone then from=one; if intwo then from=two; if inone then from=one; else from=two; B or C

28 Question 31 Formats can be used for: Changing how values are displayed Instructing how raw data should be read Determining how categories will be constructed Any of the above Question 32 ODS statements include those that: Allow output to be delivered to standard file types Control some graphics options Turn output tables into data sets Any of the above

29 Question 33 A sorted data set is required when: Using a by statement in a procedure Using a class statement in a procedure Either A or C Using a by statement in a data step Either A or B Question 34 Missing values in SAS are represented by: The dot (.) character A dot (.) for numeric variables, blanks for character Blanks None of the above

30 Question 35 For where statements and if statements, which of the following is true: Either can be used in a data step Either can be used in any procedure If statements can be used in a data step, but generally not in procedures Both A and B Both A and C Question 36 Dates in SAS are: Stored internally in units of days Have January 1 st, 1960 corresponding to the value 0 All of A, B and C Have the numeric variable type Both A and B

31 Question 37 Which attributes can be modified for graph fills: Color and transparency Style and weight Style and size Both A and B Both A and C Question 38 If a variable is used more than once in the column specification in PROC REPORT, it must be A numeric variable A character variable B or D Renamed for all but one use Aliased for all but one use

32 Question 39 Which of the following procedures can display variable values in order without using sort? PROC REPORT PROC FREQ PROC PRINT Both A and B Both A and C Question 40 For the code at the right, the names of the statistic variables in the results data set will be: mean median std mean_systolic median_systolic stddev_systolic systolic_mean systolic_median systolic_stddev meansystolic mediansystolic stddevsystolic