Practice Exercises

11 Topics Copy and run the code from the yellow box below:

The NUM data set contains a population of 10 data points.

A z-score is a measure of the number of standard deviation above or below the mean.

It can be calculated as:

z = x - µ/σ where

x = the value to be standardized

µ = the mean

σ = the standard deviation

Compute the z-score for each data points.

Data Num2;

Set Num;

i = 1; *Create an arbitrary variable for merging purpose;

Run;

proc means data=num2 noprint;

Var Rnumber;

By i;

Output out=stat mean=mean std=std;

run;

Data Zscore;

Merge Num2 Stat;

By i;

Zscore = (Rnumber - Mean)/std;

Run;

Note: z-score can also be computed using Proc Standard.

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