Week 1 Notes - Psychology 211
Week 1 Notes - Psychology 211 Psychology 211
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This 3 page Class Notes was uploaded by Kennedy Patterson on Friday January 23, 2015. The Class Notes belongs to Psychology 211 at University of Alabama - Tuscaloosa taught by Andre Souza in Spring2015. Since its upload, it has received 1479 views. For similar materials see Psychology 211-003 Elem Statistical Methods in Psychlogy at University of Alabama - Tuscaloosa.
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Date Created: 01/23/15
Chapter 1 1915 1 What is Statistics a The science of learning from data measuring controlling and communicating uncertainty b 2 Provides Methods for a Planning how to collect data for research studies b Summarizing the Data c Making predictions based on the data 3 Science of quantifying and understanding a Helps make decisions when faced with uncertainty 6 Heterogeneity is universal 7 The amount of variation that one expects by chance 8 The amount of variation is BIGGER than the variation you would expect as normal 9 statistically significant a No more variation than what one would expect 9 not statistically significant 9 10 Fundamentals a Why do some things vary more than expected i Something an explanatory variable is influencing changing the variation of whatever we are observing response variable ii variation you are trying to understand iii variable that you think is influencing the variation of the response variable 11 something that takes up different values a Not a value itself but that this value has 12 summary of the information in a collection of data what the data has to say about the phenomenon provides predictions about a population on the basis of a sample use statistics to infer values of parameters 14 total set of units of interest 15 subset of population of interest 13 Chapter 1 1915 16 number that summarizes a population 17 number that summarizes a sample 18 each member of population has an equal chance of being selected to be part of a sample 19 a taking two groups and contrasting b comparing two different groups Universe Population Sample Mean Age Angelina Jolie impossible parameter Random lady that looks like Angelina Mary statistic that represents parameter Population l Sample l Parameter l Statistic Chapter 1 1915 1 Graphical representation of decision involved in the choice of statistical procedures 2 quantitative Data data obtained by measuring objects or events frequency data count data Data representing counts or number or observations in each category set of items of interest drawn from population sample selected so that every member of the population has an equal chance of being included in the sample numerical values calculated from data in a sample intended to summarize the data 7 methods of organizing summarizing and presenting data 8 data values that represent measurements of object or events sample selected because it is easy to obtain such as a sample of volunteers 10 how much a value differs across different elements in the population or sample of interest number calculated from data in a population that quantifies a characteristic of the population 12 methods of using sample data to make inferences about a population numerical values calculated from data in a sample intended to summarize the data 14 another term for measurement data 15 data values that indicated membership in a particular category When summarized it consists of counts or frequencies 9 11 13