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Agenda for January 27 th Administrative Items/Announcements Attendance Handout: presentation signup Pictures today! Finish this week’s topic: Research Methods Methods exercises
Statistics Statistical analyses used to quantify strength of association between variables Involves the use of mathematics to organize, summarize, and interpret numerical data
Descriptive Statistics Used to organize and summarize data Provide an overview of numerical data Two main components: Central Tendency Variance
Central Tendency Three components to understanding the typical or average score median mean mode
Median Score that falls exactly in the center of the distribution of scores Half of the scores fall above the median and half fall below the median
Mean Arithmetic average of the scores in the distribution
Mode the most frequent score in the distribution
Variance How much the scores in the data set vary from each other and the mean Standard Deviation - index of the amount of variability in a set of data
Inferential Statistics Used to evaluate the probability that results might be due to chance
Statistical Significance Statistical significance - when low probability that observed findings are due to chance Very low usually means less than 5 chances in 100
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Descriptive Statistics Statistical Notation Measures of Central Tendency Measures of Variability Estimating Population Values.
Chapter 14 Analyzing Quantitative Data. LEVELS OF MEASUREMENT Nominal Measurement Nominal Measurement Ordinal Measurement Ordinal Measurement Interval.
Agenda for January 25 th Administrative Items/Announcements Attendance Handouts: course enrollment, RPP instructions Course packs available for sale in.
Lect 10b1 Histogram – (Frequency distribution) Used for continuous measures Statistical Analysis of Data ______________ statistics – summarize data.
Intro to Descriptive Statistics
Chapter 2 Research Methods. The Scientific Approach: A Search for Laws Empiricism: testing hypothesis Basic assumption: events are governed by some lawful.
Measures of Central Tendency
The Data Analysis Plan. The Overall Data Analysis Plan Purpose: To tell a story. To construct a coherent narrative that explains findings, argues against.
Chapter 2: The Research Enterprise in Psychology
8-10% of AP Exam. » Does sleeping less than seven hours a day reduce how long you will live? » Do violent video games make people more aggressive? » Can.
Today’s Questions How can we summarize a distribution of scores efficiently using quantitative (as opposed to graphical) methods?
Chapter 2 The Research Enterprise in Psychology. n Basic assumption: events are governed by some lawful order Goals: Measurement and description Understanding.
1.3 Psychology Statistics AP Psychology Mr. Loomis.
Chapter 1: The Research Enterprise in Psychology.
The Research Enterprise in Psychology. The Scientific Method: Terminology Operational definitions are used to clarify precisely what is meant by each.
Descriptive Statistics A Short Course in Statistics.
Thinking About Psychology: The Science of Mind and Behavior 2e Charles T. Blair-Broeker Randal M. Ernst.
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