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PSY 138  Reasoning In Psychology Using Statistics  Illinois State Study Resources

Exam 1 Study Guide
School: Illinois State
Course: Reasoning In Psychology Using Statistics
Psy 138 Exam 1 Bias: a systematic error in one direction. Good research has no bias. (High=not centered; low=unreliable ) Central tendency: statistical measure that identifies a single score as representative of an entire distribution. The goal of central

Lab 23
School: Illinois State
Course: Reasoning In Psychology Using Statistics
Lab23 Worksheet PSY138,Spring2013 (1)Ifyouweretotake100samplesofsizen=10andcompute95%confidenceintervals,howmanyofthem wouldyouexpectwouldincludethepopulation?Whataboutfor99%CIs?Tryitoutusingtheapplet.Set yourSamplesizeto10&Clicksample(clearfirstifyouhadp

LAB 3
School: Illinois State
Course: Reasoning In Psychology Using Statistics
Lab 3 Worksheet Task I. Measuring personal characteristics (group project). Measure height of an individual in the group Describe your method of measurement. My method of measurement would be recorded with the length, while the participant is lying down.

Lab 15
School: Illinois State
Course: Reasoning In Psychology Using Statistics
Lab 15 Assignment PSY 138, Spring 2013 For questions 16: Use the chart to figure out which test to use for each study described below. Based on the information given, indicate: (a) Whether a onetailed test can be used or if a twotailed test is more app

Quiz 5 Example
School: Illinois State
Course: Reasoning In Psychology Using Statistics
1.Whatarethegenerallyacceptedcutoffpoints(orconventionallevelsofsignificance) inhypothesistestinginpsychology? .01and.05. 2.TheyourcriticalZscoreis1.64andyoursamplesZscoreis1.32onthecomparison distribution. Thenullhypothesiscannotberejected. 3.Basedonther

Exam 2 Study Guide
School: Illinois State
Course: Reasoning In Psychology Using Statistics
Psy 138: Exam 2 Cautions: Different scalesconvert to zscores Restriction of range Outliers Causal claimsinterpretive caution o There must be covariation between the 2 variables o Directionality problem: what causes what? XY or YX? Correlation: stati

Exam 3 Study Guide
School: Illinois State
Course: Reasoning In Psychology Using Statistics
Exam 3 Distribution of sample means Hypothesis testing 1 sample z 1 sample t Related sample t Independent sample t Hypothesis testing: inferential procedure that uses sample data to evaluate the credibility of a hypothesis about a population. Want to be a

Stats Final Exam
School: Illinois State
Course: Reasoning In Psychology Using Statistics
Stats Final Exam Statistics: tools used to make decisions based on data Descriptive Statistics: o One variable: frequency distribution o Display results in a frequency distribution table and histogram Make a deviations table to get measures of central te

Stats Formulas
School: Illinois State
Course: Reasoning In Psychology Using Statistics
ZorTtest StandardError (Estimated) Degreesof freedom/ #Ofdifference scores OneSamplez OneSamplet Df=n1 RelatedSamplet Df=nD1 IndependentSamplet Df=nA+nB2 Meanofdifferences Pooledvarianceof Independent

Lab 25
School: Illinois State
Course: Reasoning In Psychology Using Statistics
Lab25Worksheet PSY138,Spring2013 1. How do we determine: a. the direction of a relationship? The direction of a relationship can be determined by calculating the pearsons r or making a scatterplot and looking at the direction the points go on the graph. b