T-Test Question

[FernandezLanier, Adriana (DCJS)]

Good morning. This is probably a basic question but can’t find anything on it. I’m conducting a t-test on my data and want to look at the one-tailed probability. In SPSS, the default is two-tailed. How can I change it two one-tailed? If I’m using 95%, do I split it to 47.5%? Thanks

 

T-TEST PAIRS=preentitle prejust WITH postentitle postjust (PAIRED)

  /CRITERIA=CI(.95)

  /MISSING=ANALYSIS.

 

 

P Please consider the environment before printing this e-mail.

 

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[statisticsdoc]

Adriana,
A t value that is significant at p < .1 in a two tailed test is significant at p < .05 in the corresponding one tailed test.
Best
Steve Brand

www.StatisticsDoc.com

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From: "FernandezLanier, Adriana (DCJS)" <[hidden email]>

Date: Thu, 13 May 2010 09:18:40 -0400

To: <[hidden email]>

Subject: T-Test Question

Good morning. This is probably a basic question but can’t find anything on it. I’m conducting a t-test on my data and want to look at the one-tailed probability. In SPSS, the default is two-tailed. How can I change it two one-tailed? If I’m using 95%, do I split it to 47.5%? Thanks

 

T-TEST PAIRS=preentitle prejust WITH postentitle postjust (PAIRED)

  /CRITERIA=CI(.95)

  /MISSING=ANALYSIS.

 

 

P Please consider the environment before printing this e-mail.

 

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This e-mail, including any attachments, may be confidential, privileged or otherwise legally protected. It is intended only for the addressee. If you received this e-mail in error or from someone who was not authorized to send it to you, do not disseminate, copy or otherwise use this e-mail or its attachments. Please notify the sender immediately by reply e-mail and delete the e-mail from your system.

[ANDRES ALBERTO BURGA LEON]

Hello Adriana:

You could look at this link: http://www.ats.ucla.edu/stat/SPSS/faq/pvalue.html

Kindly

Andrés

Mg. Andrés Burga León
Coordinador de Análisis e Informática
Unidad de Medición de la Calidad Educativa
Ministerio de Educación del Perú
Calle El Comercio s/n (espalda del Museo de la Nación)
Lima 41
Perú
Teléfono 615-5840

"FernandezLanier, Adriana (DCJS)" <[hidden email]>
Enviado por: "SPSSX(r) Discussion" <[hidden email]>

13/05/2010 08:24 a.m.

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Asunto	T-Test Question

Good morning. This is probably a basic question but can’t find anything on it. I’m conducting a t-test on my data and want to look at the one-tailed probability. In SPSS, the default is two-tailed. How can I change it two one-tailed? If I’m using 95%, do I split it to 47.5%? Thanks
 
T-TEST PAIRS=preentitle prejust WITH postentitle postjust (PAIRED)
  /CRITERIA=CI(.95)
  /MISSING=ANALYSIS.
 
 
P Please consider the environment before printing this e-mail.
 

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This e-mail, including any attachments, may be confidential, privileged or otherwise legally protected. It is intended only for the addressee. If you received this e-mail in error or from someone who was not authorized to send it to you, do not disseminate, copy or otherwise use this e-mail or its attachments. Please notify the sender immediately by reply e-mail and delete the e-mail from your system.