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**Proc Means [2-3]**

*SAS Base Exam*

**Specifying Statistics**

By default, the MEANS procedure computes the n, mean, standard deviation, minimum and maximum.

What if you need other statistics such as median, mode or quantiles?

Simply add the statistics options to the MEANS procedure to request the statistics you need.

__Example__

Copy and run the

**INTERNET**data set from the yellow box below.

Let's supposed we need the mean, standard deviation, Q1 (lower quantile) and Q3 (upper quantile) only.

__Example__

Proc Means Data=Internet Mean Std Q1 Q3;

Var Chrome;

Run;

The mean, standard deviation, Q1 and Q3 statistics are specified in the MEANS procedure:

This will generate a table with only the statistics being requested:

**Specifying Decimal Places**

By default, the MEANS procedure displays 7 decimal places:

Sometimes, you might want to display the values at different decimal places.

Simply add the MAXDEC= option to the MEANS procedure to control the decimal places to display.

__Example__

Proc means Data=Internet Maxdec=2;

Var Chrome;

Run;

The Maxdec=2 displays the statistics in 2 decimal places:

**Exercise**

Write a SAS program and compute the Q1, Median and Q3 of the FIREFOX variable from the INTERNET data set.

Display the statistics in 3 decimal places.

Display the statistics in 3 decimal places.

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