This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: We use both tails of the sampling distribution Our alternative hypothesis is non directional H : = IV. One tailed tests o A directional test is called a onetailed test We use only one tail of the sampling distribution Out alternative hypothesis is directional H 1 : > IV. Why use a one tailed vs. twotailed tests? o Only if we have a theoretical reason in advance. o Onetailed test gives us more power o But we might miss unexpected results IV. Using the tdistribution o For smaller samples, we use the tdistribution instead of the zdistribution o Formula is the same: T calculated = ( )/ (s/ n ) o But our critical value of t might be different than our critical value of Z Z calc = 2.5 Z calculated = ( )/ (s/ n ) = 2.8 = (2.82.5)/(6/ 100 ) S x = 6 Z calculated = 5 n = 100 = .05 H : = H 1 :...
View
Full
Document
This note was uploaded on 03/15/2009 for the course SOCI 301 taught by Professor Kupchick during the Spring '09 term at University of Delaware.
 Spring '09
 Kupchick

Click to edit the document details