# UMass Amherst PSYCH 241 - study guide for exam 2 (4 pages)

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# study guide for exam 2

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## study guide for exam 2

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Pages:
4
School:
University of Massachusetts Amherst
Course:
Psych 241 - Meth Inqry in Psych
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241 Study Guide for Exam 2 Example Questions Be prepared to identify and sequence the seven overarching stages of theory driven research 1 Theory or general problem of interest research question 2 Generate specific testable hypothesis 3 Design study and evaluate ethics 4 Conduct study so as to achieve unambiguous results evaluate internal external validity 5 Collect and summarize data descriptive statistics 6 Draw conclusions from these analyses inferential statistics 7 Reject modify support original hypothesis What are the three steps of data analysis and interpretation 1 Get to know the data inspect data carefully identify errors in data consider whether the data makes sense or not 2 Summarize the data use descriptive statistics central tendency variability effect size and graphical displays of data 3 Confirm what the data reveal representative of the population mean perform inferential statistics analysis What does the use of statistical software packages mean for the researcher Means researchers do few calculations but need strong understanding of methods Design Analysis What are the three things you should do in getting to know your data Inspect data carefully identify errors in data consider whether the data makes sense or not Be prepared to describe the three measures of central tendency we discussed Mean sum of scores divided by number of scores arithmetic average Median middle point of frequency distribution score that splits the distribution in half Mode most frequent score in distribution can be more than one mode Be prepared to describe the four measures of variability we discussed Range of scores difference between highest lowest max min Variance s 2 sum of the squared differences between X1 and X divided by sample size n 1 Standard Deviation SD or s how far on average a score x is from the sample mean X Measures of Effect Size formula for Cohen s d d X1 X2 SD How is the standard error of the mean related to the standard deviation Measures how well the

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