The MEANS Procedure

Example 7: Computing a Confidence Limit for the Mean

Procedure features:

PROC MEANS statement options:

	ALPHA=
	FW=
	MAXDEC=

CLASS statement

This example

specifies the field width and number of decimal places of the statistics
computes a two-sided 90 percent confidence limit for the mean values of MoneyRaised and HoursVolunteered for the three years of data.

If these data are representative of a larger population of volunteers, the confidence limits provide ranges of likely values for the true population means.

Program

data charity; input School $ 1-7 Year 9-12 Name $ 14-20 MoneyRaised 22-26 HoursVolunteered 28-29; datalines; Monroe 1992 Allison 31.65 19 Monroe 1992 Barry 23.76 16 Monroe 1992 Candace 21.11 5 . . more lines of data . Kennedy 1994 Sid 27.45 25 Kennedy 1994 Will 28.88 21 Kennedy 1994 Morty 34.44 25 ;

proc means data=charity fw=8 maxdec=2 alpha=.1 clm mean std;

class Year;

var MoneyRaised HoursVolunteered; title 'Confidence Limits for Fund Raising Statistics'; title2 '1992-94'; run;

Output

PROC MEANS displays the lower and upper confidence limits for both variables for each year.

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PROC MEANS displays the lower and upper confidence limits for both variables for each year.