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Chapter 1

Chapter 1. Math Anxiety. Do not flip through the text Familiarize yourself with the index & glossary Forget past math failures…statistics is different! Yerkes-Dodson Law: Some anxiety is helpful Over-prepare for tests to reduce test anxiety Use your resources!

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Chapter 1

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  1. Chapter 1

  2. Math Anxiety • Do not flip through the text • Familiarize yourself with the index & glossary • Forget past math failures…statistics is different! • Yerkes-Dodson Law: Some anxiety is helpful • Over-prepare for tests to reduce test anxiety • Use your resources! • Self-Fulfilling Prophecy: think positive • Work with a partner! Icebreaker activity

  3. Uses of Statistics Statistics: branch of mathematics that focuses on the organization, analysis & interpretation of a group of numbers. Uses: -read the work of other psychologists -do your own research -hone your reasoning & intuition

  4. Misuses of Statistics Using Correlations to infer causation Incorrect Interpretation of Data

  5. Calculator Use • Complete the “Calculator Operations Worksheet” • -Work with your partner

  6. Descriptive vs. Inferential Statistics • Descriptive statistics • Summarize/organize scores from a research study • Abbreviates data that we have • Includes percentage, range, mean, mode, median, standard deviation and variance • EX: What’s the average age of students in this class? Ask each student & average • Inferential statistics • Draw conclusions/make inferences that go beyond the scores from a research study • -allows statisticians to generalize from a sample to a population • Uses a small amount of data to infer characteristics about a larger group • EX: What’s the average age of students at SBVC? Ask this class & then infer about SBVC • RISKY! Especially if the sample is not representative of the population • However, predictions are made with better than chance accuracy & limitations are known

  7. Samples & Populations • Population: the entire group of people or animals in which the researcher is interested in • Sample: a smaller number of observations taken from the total number making up the population Population Sample

  8. Statistics & Parameters Inferential statistics is the technique of predicting unknown parameters (of a population) on the basis of known statistics (from a sample). Parameter: any measure obtained by having measured an entire population Statistic: any measure obtained by having measured a sample

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