topic How to run t-test on specific numbers? in SAS Programming

How to run t-test on specific numbers?

bd_user_10 — Tue, 29 Jan 2019 11:41:05 GMT

Hi Everyone,

I would like to perform a t-test on the following CAR to see whether they are significantly different to zero.

year	CAR_11
1995	1.5786
1996	-1.8834
1997	10.2719
1999	24.2477
2000	32.1328
2001	35.7089
2002	23.5392
2003	2.0316
2005	5.8985
2006	20.3305
2007	18.4754
2008	49.5314
2009	53.0031
2011	29.6018
2013	40.2564
2014	16.6888

Can anybody please help? Thanks.

Re: How to run t-test on specific numbers?

PeterClemmensen — Tue, 29 Jan 2019 10:30:17 GMT

Like this?

data have;
input year CAR_11;
datalines;
1995 1.5786
1996 -1.8834
1997 10.2719
1999 24.2477
2000 32.1328
2001 35.7089
2002 23.5392
2003 2.0316
2005 5.8985
2006 20.3305
2007 18.4754
2008 49.5314
2009 53.0031
2011 29.6018
2013 40.2564
2014 16.6888
;

proc ttest data=have h0=0 sides=2 alpha=0.05;
   var CAR_11;
run;

Re: How to run t-test on specific numbers?

Ksharp — Tue, 29 Jan 2019 13:54:39 GMT

Since t-test is for two levels variable, and you don't have CLASS variable. I would use PROC UNIVARIATE.

data have;
input year CAR_11;
datalines;
1995 1.5786
1996 -1.8834
1997 10.2719
1999 24.2477
2000 32.1328
2001 35.7089
2002 23.5392
2003 2.0316
2005 5.8985
2006 20.3305
2007 18.4754
2008 49.5314
2009 53.0031
2011 29.6018
2013 40.2564
2014 16.6888
;
proc univariate data=have;
var car_11;
run;

位置检验: Mu0=0
检验 	统计量 	p 值
Student t 	t 	5.380997 	Pr > |t| 	<.0001
符号 	M 	7 	Pr >= |M| 	0.0005
符号秩 	S 	66 	Pr >= |S| 	<.0001

Re: How to run t-test on specific numbers?

ballardw — Tue, 29 Jan 2019 16:21:06 GMT

@Ksharp

@Ksharp wrote:

Since t-test is for two levels variable, and you don't have CLASS variable. I would use PROC UNIVARIATE.

data have;
input year CAR_11;
datalines;
1995 1.5786
1996 -1.8834
1997 10.2719
1999 24.2477
2000 32.1328
2001 35.7089
2002 23.5392
2003 2.0316
2005 5.8985
2006 20.3305
2007 18.4754
2008 49.5314
2009 53.0031
2011 29.6018
2013 40.2564
2014 16.6888
;
proc univariate data=have;
var car_11;
run;

位置检验: Mu0=0
检验 	统计量 	p 值
Student t 	t 	5.380997 	Pr > |t| 	<.0001
符号 	M 	7 	Pr >= |M| 	0.0005
符号秩 	S 	66 	Pr >= |S| 	<.0001

I see your example output with an oriental font for some text. Is that what you saw before pasting or are we getting a forum artifact of some sort?

           Tests for Location: Mu0=0

Test           -Statistic-    -----p Value------

Student's t    t  5.380997    Pr > |t|    <.0001
Sign           M         7    Pr >= |M|   0.0005
Signed Rank    S        66    Pr >= |S|   <.0001

Re: How to run t-test on specific numbers?

Ksharp — Thu, 31 Jan 2019 12:38:01 GMT

Yeah. We are getting the same result.