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by: Tremayne Beer

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3

# Adv Statistics Psych I PSYC 7302

Marketplace > University of Memphis > Psychlogy > PSYC 7302 > Adv Statistics Psych I
Tremayne Beer
University of Memphis
GPA 3.84

Richard Dale

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COURSE
PROF.
Richard Dale
TYPE
Class Notes
PAGES
3
WORDS
KARMA
25 ?

## Popular in Psychlogy

This 3 page Class Notes was uploaded by Tremayne Beer on Friday October 23, 2015. The Class Notes belongs to PSYC 7302 at University of Memphis taught by Richard Dale in Fall. Since its upload, it has received 11 views. For similar materials see /class/228446/psyc-7302-university-of-memphis in Psychlogy at University of Memphis.

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Date Created: 10/23/15
PSYC 7302 Basic statistics II observation Z Score 7 r r 72 Lowerendpmmzi HPPErendDamt 2 n Highlighted ma ms l observation Z score Highligmed area 4 9x r r r i 4 Lowav cnduum 155 Upmr mdpolnl O C Logic 0 If an observation has a z score of greater than about L65 or so we would consider this to be a very unlikely value given our obtained sample Now our sample But in inferential statistics we don t speak of individual scores but rather of our obtained sample compared to a theoretical range of possible samples 0 Where on that theoretical range would our obtained sample lie A sample of samples in principle an in nite number of samples Some numbers 3 Larger than 0 Some numbers Does M 95CI include 0 Some numbers 0 95Cl 0 Take your mean and add a number subtract a number from it to obtain an Interval 0 Which number to addsubtract 0 95Cl M tos SE SPSS We can ask SPSS to do this test for us directly rather than build a con dence interval It will calculate an obtained t given our mean SE and degrees of freedom Nl It will then calculate a pvalue the probability we would obtain that t just by chance given the theoretical t distribution Onesample ttest 0 Is your M different from 0 0 In other words does M 0 a signi cant statistic above or below 0 0 Calculate t See where it lies on the t distribution Independentsamples 0 You have two means MI and M2 0 You have a hypothesis that MI should be larger Is it signi cantly so 0 Calculate MIM2 is the different signi cantly larger than 0 0 Compute a t for MIM2 see if that t is larger than what you d expect by chance

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