Chapter 2 Notes
Chapter 2 Notes PSY 2110
Popular in Statistics for Behavioral Sciences
Popular in Psychology (PSYC)
This 3 page Class Notes was uploaded by Shannan Dillen on Thursday September 22, 2016. The Class Notes belongs to PSY 2110 at Ohio University taught by S. Tice-Alicke in Fall 2016. Since its upload, it has received 7 views. For similar materials see Statistics for Behavioral Sciences in Psychology (PSYC) at Ohio University.
Reviews for Chapter 2 Notes
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 09/22/16
Chapter 2: Basic Concepts Scalesof Measurement – the set of possible numbers that maybe obtained by the measurement process 1. Nominal -placeitems into categories Ex: political affiliation,gender,academic major -no order 2. Ordinal -simplest true scale -organizesevents, objects, etc. along a continuum -ordered according to magnitude Highto low, low to high Ex: freshman,sophomore, junior, senior -don’t know actual numbers, how much more/how much less Ex: Olympic medals 3. Interval -eachscore indicates anactual amount -number represents quantity -equal unit of measurement separating eachscore -allows for negative numbers -canhave a scoreof zero, but it isnot an absolute zero Absolute zero – nothing there, absence of characteristics Ex: Fahrenheit temperature scale,assessments 4. Ratio -eachscore indicates actual amount -equal unit separating each score -score ofzero is an absolute zero -no negative numbers Ex: test scores, number of pets you have Variable–anything that cantake on morethan one specific value Ex: gender,IQ scores,hair color DiscreteVariable –results in a whole number Dichotomous – something that results in two amounts or two categories Continuous Variable –allows for fractional amounts Ex: weight –allows for decimals,but could bea whole number Independent Variable –the variablemanipulatedby the experimenter Ex: amount of exercise Dependent Variable –variablebeing measured Ex: measuring weight Control Group –gets treated likeexperimental group, but gets nothing ofthe independent variable Experimental Groups –get the independent variable To determine which variableiswhich: What is being measured? What is thought to influence the dependent variable? 2 2 Participant X X Y Y XY # times # timessick skipped class 1 5 25 1 1 5 2 4 16 2 4 8 3 3 9 3 9 9 4 2 4 4 16 8 Notation X or Y ∑ - summation sign –to sum, to add – “the sum of…” ∑X =add all xvalues 2 ∑X = square eachxvalue, then sum 2 (∑X )=sum all x values,then square the total (∑X)(∑Y)=sum all xvalues, sum all y values, multiply ∑XY = multiply eachx valueby corresponding y value, then add N = population size; # of casesin the population n = samplesize; # of casesin the sample ∑CX= C∑X The notation ∑CXmeans to multiply every valueof X by the constant C and then sum. A constant is any number that does not changeits value ina givensituation.
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'