[R] t-stat Curve

From: Isaac Barjis <IBarjis_at_CityTech.Cuny.Edu>
Date: Wed 27 Sep 2006 - 15:07:32 GMT


Number of subjects = 25
Mean of Sample = 77
Standard Deviation (s) = 12
sem = 2.4
df = 24

The claim is that population mean is less than 80 * > 80
So our H0 (null hupotheis) is * > 80

> qt(.95,24)

[1] 1.710882
> qt(0.05, 24)

[1] -1.710882

tstat = -1.25 on t24 falls between 1.711 (.95,24) and *1.711 (.005,24)

How Could I sketch t curve for the above data where my * would be at the center?

Best Regards
Isaac

Dr. I. Barjis
Assistant Professor
Summer and Evening Coordinator
Department of Biological Sciences
Room P313
300 Jay Street
Brooklyn, NY 11201

Phone: (718)2605285
Fax: (718)2548680
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http://websupport1.citytech.cuny.edu/Faculty/ibarjis



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Received on Thu Sep 28 01:11:54 2006

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