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Week 3 Practice WorksheetPSY/315 Version 6

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University of Phoenix Material 

Week 3 Practice Worksheet 

Prepare a written response to the following questions. Each correct answer is worth one point unless

otherwise noted. Week 3 Practice Worksheet is worth 20 points.

Chapter 7

1. List the four steps of hypothesis testing, and eplain the procedure and logic of each.

!tep 1" #estate the question as a research hypothesis and a nullhypothesis a$out the populations. %his is necessary to si&plify thehypothesis and recogni'e the populace that is $eing worked with duringthe study.

!tep 2" (eter&ine the characteristics of the co&parison distri$ution.)ases with the null hypothesis $eing correct the assess&ent distri$utionis weighed against the score $ased on the sa&ple*s outco&es.

!tep 3" (eter&ine the sa&ple cutoff score. %his pro+ides the researcher aspot where the null hypothesis will $e reected.

!tep -" (eter&ine the sa&ple*s score on the co&parison distri$ution.a+ing the &odel

outco&es allows the / score a$le to $e calculated with this for&ula '

4 5 6. %he / score is to $e weighed againstthe cutoff sa&ple score that was for&ulated in the third step of thisprocedure.

2. 7ased on the infor&ation gi+en for the following studies, decide whether to reect the null hypothesisor fail to reect the null hypothesis. 8n the )onclusion colu&n, type either 9#eect: or 9;ail to #eect.:

 

8/17/2019 PSY315_Week1_Worksheet_1_1

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Week 3 Practice WorksheetPSY/315 Version 6

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) ? 1 @ 0.01 1 igh predicted4

( ? 1 @ 0.01 2

Pro$le& )utoff !core / !core )onclusion < 1.C- 2 reected

7 D1.FC 2 reected

) D2.23 2 Got a$le toreect

( D2.?H 2 Got a$le torefect

3. < researcher predicts that listening to &usic while sol+ing &ath pro$le&s will &ake a particular $rainarea &ore acti+e. %o test this, a research participant has her $rain scanned while listening to &usicand sol+ing &ath pro$le&s, and the $rain area of interest has a percentage signal change of ?H.;ro& &any pre+ious studies with this sa&e &ath pro$le&*s procedure $ut not listening to &usic4, itis known that the signal change in this $rain is nor&ally distri$uted with a &ean of 3? and a standardde+iation of 10.

a. Bsing the .01 le+el, what should the researcher concludeI !ol+e this pro$le& $y stating the cutoff score, the ' score, and the decision $ased upon the calculated results.

)utoff score 2.33

/ !core 2.30

)onclusion" failed to reect Gull ypothesis

Eplain your answer to so&eone who has ne+er had a course in statistics $ut who is fa&iliar with &ean,standard de+iation, and Z  scores4.

;ailing to #eect the Gull ypothesis in pro$le& 3 a$o+e, we can safelyconclude that there is not sufficient e+idence to clai& an effect fro&listening to &usic $ased upon a 1J threshold.

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