{"id":12271,"date":"2018-03-30T10:08:02","date_gmt":"2018-03-30T10:08:02","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=12271"},"modified":"2021-05-09T13:16:27","modified_gmt":"2021-05-09T07:46:27","slug":"sas-standard-deviation","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/sas-standard-deviation\/","title":{"rendered":"SAS Standard Deviation – Ways of Measure Standard Deviation"},"content":{"rendered":"

In our previous article, we discuss SAS Cross Tabulation<\/strong> and SAS Frequency Distribution<\/strong>. Now we will be looking at another statistical procedure today, that is SAS Standard Deviation. We will discuss two types of procedure in which we can apply standard deviation to our data.<\/p>\n

Moreover, we will see different ways to measure SAS\u00a0Standard Deviation; SAS PROC MEANS & SAS\u00a0PROC SURVEYMEANS.<\/p>\n

So, let’s start with\u00a0SAS Standard Deviation<\/span>.<\/p>\n

SAS Standard Deviation<\/h2>\n

SAS Standard deviation (SD) is a measure of how varied is the data in a\u00a0given dataset<\/strong>. Mathematically, it tells you\u00a0the closeness of each data point with the mean of the dataset.<\/p>\n

If the value of standard deviation is close to 0, it indicates that the data points are very close to the mean of the data set and a high standard deviation indicates that the data is spread and the data points are spread out over a wide range of values.<\/p>\n

\"SAS<\/a>

Example of SAS Standard Deviation<\/p><\/div>\n

Ways of Measuring SAS Standard Deviation<\/h2>\n

Here, we will discuss\u00a0two types of\u00a0Standard deviation in SAS programming language.<\/p>\n

a. SAS Standard Deviation Using PROC MEANS<\/h3>\n

We saw SAS PROC MEANS in the earlier tutorial to find arithmetic mean of our data. You can\u00a0measure the Standard Deviation using proc means, you have to choose the\u00a0STD\u00a0option in the PROC step. It will display\u00a0the Standard Deviation values for each numeric variable in the dataset.<\/p>\n

Syntax-<\/strong><\/p>\n

PROC MEANS DATA = dataset STD;<\/pre>\n
Example-<\/strong>
\nTo do this let us use PROC SQL <\/strong>procedure. Let us group the data using \u2018type\u2019 and \u2018make\u2019 of cars and calculate the standard deviation for selected variables using the STD option with the PROC means step.<\/p>\n
PROC SQL;\r\ncreate table CARS1 as\r\nSELECT make,type,horsepower,cylinders,weight\r\nFROM\r\nSASHELP.CARS\r\nWHERE make in ('Audi','BMW')\r\n;\r\nRUN;\r\nPROC MEANS DATA=CARS1 STD;\r\nRun;<\/pre>\n
 <\/p>\n
\"SAS<\/a>
SAS Standard Deviation Using PROC MEANS<\/p><\/div>\n
b. SAS Standard Deviation Using PROC SURVEYMEANS<\/h3>\n
In this statement, you identify the data set to be analyzed, specify the variance estimation method, and provide sample design information.<\/p>\n
Syntax-<\/strong><\/p>\n
PROC SURVEYMEANS options statistic-keywords;\r\nBy variables;\r\nClass variables;\r\nVar variables;<\/pre>\n
Example-<\/strong><\/p>\n
PROC SURVEYMEANS DATA=CARS1 STD;\r\nClass type;\r\nVar type horsepower;\r\nods output statistics=rectangle;\r\nRun;\r\nPROC PRINT DATA=rectangle;\r\nRun;<\/pre>\n
\u00a0<\/strong>
\nThe images below shows the output of the code above. It shows a distribution of data for variable \u2018Horsepower\u2019 for 95% confidence interval which means that there is a probability that the spread of the data is within 95% of this.\u00a0<\/strong><\/p>\n
 <\/p>\n
\"SAS<\/a>
SAS Standard Deviation Using PROC SURVEYMEANS<\/p><\/div>\n
 <\/p>\n
i. Using <\/strong>BY\u00a0option to group standard deviation<\/strong>
\nWe grouped data to find meaning in the proc means tutorial, we can do the same for standard deviation also.<\/p>\n
Example-<\/strong><\/p>\n
PROC SURVEYMEANS DATA=CARS1 STD;\r\nVar \u00a0horsepower;\r\nBY make= \u2018BMW\u2019;\r\nRun;\r\nproc print data=CARS1;\r\nrun;<\/pre>\n
 <\/p>\n
\"BY<\/a>
BY option to group standard deviation<\/p><\/div>\n
This was all\u00a0in SAS Standard Deviation Tutorial. Hope you like our explanation.<\/p>\n
Conclusion<\/h2>\n
Hence, you understood What is SAS Standard Deviation and how we can calculate standard deviation using two procedures the SAS PROC MEANS procedure and the SAS PROC SURVEYMEANS procedure.<\/p>\n
Also, the use of BY statement for better analysis of our data. We will learn more interesting statistical procedures in the coming tutorials. For any queries post your doubts in the comments section below.<\/p>\n","protected":false},"excerpt":{"rendered":"
In our previous article, we discuss SAS Cross Tabulation and SAS Frequency Distribution. Now we will be looking at another statistical procedure today, that is SAS Standard Deviation. We will discuss two types of...<\/p>\n","protected":false},"author":6,"featured_media":12300,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[59],"tags":[12168,12192,12264,12265,13726],"class_list":["post-12271","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sas","tag-sas-proc-means","tag-sas-proc-surveymeans","tag-sas-standard-deviation","tag-sas-standard-deviation-using-proc-means","tag-standard-deviation-in-sas"],"yoast_head":"\nSAS Standard Deviation - Ways of Measure Standard Deviation - DataFlair<\/title>\n<meta name=\"description\" content=\"SAS Standard Deviation tutorial-Ways of Measuring SAS Standard Deviation:SAS PROC MEANS & SAS PROC SURVEYMEANS, What is Standard deviation in SAS with example\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/data-flair.training\/blogs\/sas-standard-deviation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SAS Standard Deviation - 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