Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

Introduction to the T Statistics, Summaries of Statistics for Psychologists

This summary is based on Gravetter, F. J., & Wallnau, L. B. (2021). Essentials of statistics for the behavioral sciences. Belmont, CA: Thomson/Wadsworth.

Typology: Summaries

2019/2020

Uploaded on 10/26/2021

elizabeth-p-3
elizabeth-p-3 🇮🇩

3 documents

1 / 2

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
pf2

Partial preview of the text

Download Introduction to the T Statistics and more Summaries Statistics for Psychologists in PDF only on Docsity!

* Basic conceprs ~ Soy 7 Standard error describes how much igFEreNCe is _Teayon-| Abie vO EAPRLL berween Mand AL Se or 72 Score stonistic Is used AO Quantity inferences about the _| _Populanon 2 MCA, om obtained digference between data hyvorneris Standard Aisronte between Me A t ____Unit_normal_tovie is used so find the Critical region if | 2-SLOLRS Form O Normal _Aistripwiion, when n> 30 or _ ____WNEn the SHiginal distribution is _apptors NOVY normany, ___divrribured, * Problem with ¢ LES ____~ Requires more ingormoation than researther typically | ____have _avoitapie |___= Requires knowiedge of the population standard deviation | ___ (0) when reseorcher usmatty have only the sample data Available. __* Introgucing the t stanstic __ ___= Estimated standard error (Sm) iS Weed as on estiniare of ___Ahe_real standard error when the yore of om Is | unknown * Formula Sample Variance SamMpIe Site (Swe ___ > THE te storitiC 1s Wied to test Iypormeses vot on ____ MNKNOWN population mean when the vorue oF os _ ____also wnknewn — | A The fOrMUIG Has thE same structure as the 2-Slore _ _-ormulA, butts uses Simin the denominator Perremuan 14 “inttoduetion to th Mpie_mean_(M) approximates population mean (A _|__* sing the t SronisTic gor nypornesis testing. KOrunacitta Pambharu 2020-0700 -0004 et Statistic” —~Compwtotion of sampie variance requires computarion of | ae SAMPLE Mean sist tomy nti O Sample are independent _S RRS OTUMELS CON _N=1 the Algiers oF sreedom ; the Number of scores tn a sample that_are independent. _ ANd free tO Vary beret fae ne ft Aire Vourton (shape. Aktermining proportions + prowavitities) 4+ Astripuarion Is The complere set_of _t varues compured for every possible random sample for a spenitic sampie. ___Stte_(n)_or 0 specitic degrees of freedom (ag) ~_AppipyWMOreL ThE Shape of the novmial artripUtion; Flatter _ ANON normal aisteivution, more spread owt, more ____voriobitiry (omer toute") in ane 1 atstriiownon USE TOE Of VOIUES of t IN the place of the unit —___Hormar table for hypothesis testing. _ 4 Exompie + ait rowtion with AWe_distF buon is lovated in the rol beyond 2.953 ond £2-2.353, thay a total of ioe (0.10) We TWO tails combined 2. Hypothesis Tens with Whee StaesTie) = NUN Wypornesss FOL OME-SOMPIE t ter sroristle t+ Sample mean - popuration mean. M-A | emated sondord error Sm Uke the z-score fOr MUO, the t StOTiSte Forms a FOTO por gs SUuor Migertnte between Mand A (nypornesis) EXPLA AEFeTENIe WELWeEN Mand A with no treat, _* When Numerator is grearer than the denominator, we OdtMiMED a AOTOR yore oF + > HE AarO Ore not ¥ Formuia_ Ss M-A — lt: — Sm consitent_with, me WyporWesis, “reyect Ho" Scanned with CamScanner