SAS A00-215 Exam Dumps

In the context of the PROC MEANS procedure in SAS, the CLASS statement is used to specify categorical variables whose unique values group the data before calculating statistics. This allows PROC MEANS to calculate statistics like the mean, sum, or standard deviation for each class or group of data defined by the CLASS variables.

The CLASS statement works as follows:

class variable-list; specifies one or more variables to define groups for analysis.

When used, PROC MEANS computes the requested statistics for each level of the variables listed, which can be very helpful for analyzing how groups compare across different statistics.

The other options are not used in the PROC MEANS procedure to specify grouping of data:

B . GROUP is not a valid statement in PROC MEANS.

C . SUMBY is not a valid statement in SAS.

D . VAR is used in PROC MEANS to specify the analysis variables for which statistics are to be computed, not to group the data.

The correct answer is D. This option uses the PROC PRINT procedure, which is used to print SAS data sets. The format statement within PROC PRINT temporarily assigns a format to a variable for the duration of the PROC PRINT step. Here is how it works:

data=sashelp.shoes; tells SAS which dataset to print.

Format sales comma12.; temporarily assigns a comma format to the sales variable, making it easier to read, especially if the numbers are large. The comma12. format adds commas for thousands, millions, etc., and displays the number in a field that is 12 characters wide.

The format is only applied for the duration of the PROC PRINT step and does not permanently change the dataset.

The other options are incorrect for the following reasons:

Option A attempts to use a PROC FORMAT step, which is for creating custom formats, not for assigning formats to variables in a dataset.

Option B uses a DATA step which could permanently assign the format to the sales variable if it were syntactically correct (it should be set sashelp.shoes; instead of Set sashelp,sheoes;).

Option C mentions PROC CONTENTS which displays metadata about variables in a dataset and does not have the capability to assign formats.

SAS 9.4 documentation for the PROC PRINT statement: SAS Help Center: PROC PRINT

Option B is the correct answer. This code will create two datasets as described. The keep= option in the data chips statement will ensure that only QtySold, Price, and Product are kept in the chips dataset, and because othersnacks does not have a keep= option, it will contain all the variables from the input dataset. The if-then-else logic directs the observations to the correct dataset based on the Type value.

Option A incorrectly uses a keep statement within the if block, which is not valid syntax. Option C attempts to use a keep statement after the output statement, which will not correctly subset the variables for the chips data set. Option D incorrectly applies the keep= option to the set statement, which would affect both output data sets, not just chips.

SAS documentation on the output statement.

SAS documentation on subsetting data in the DATA step.

The PROC CONTENTS step in SAS is used to display metadata about a SAS dataset, including information such as the names of variables, types of variables (numeric or character), lengths of variables, and other attributes like formats, labels, and indexes. Therefore, the correct answer is:

A) a report showing the descriptor portion of the REVENUE data set

The descriptor portion of a SAS data set contains metadata about the dataset's structure, not the actual data values or any specific information about individual variables beyond their structure and definition in the dataset. Options B, C, and D suggest details that are not part of the dataset's descriptor information as shown by PROC CONTENTS.

The correct answer is option D, which uses the LIBNAME statement correctly to assign a library reference to an Excel workbook and specifies the correct syntax for accessing a worksheet within that workbook. The syntax for this option is:

libname exlib xlsx 'c:\class.xlsx';

proc print data=exlib.class_test;

run;

This code snippet assigns the library reference exlib to the Excel workbook located at c:\class.xlsx using the XLSX engine. The PROC PRINT step is then used to display the contents of the worksheet named CLASS_TEST within that workbook. The library reference exlib combined with the dataset name class_test (following the .) correctly specifies the worksheet to be printed. The other options (A, B, C) are incorrect due to various reasons: incorrect syntax for the LIBNAME statement, incorrect specification of the dataset to be printed, and incorrect path specifications. Reference: SAS 9.4 Guide to Software Updates.