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Agenda for January 27 th

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

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Agenda for January 27 th

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  1. Agenda for January 27th • Administrative Items/Announcements • Attendance • Handout: presentation signup • Pictures today! • Finish this week’s topic: Research Methods • Methods exercises

  2. Statistics • Statistical analyses used to quantify strength of association between variables • Involves the use of mathematics to organize, summarize, and interpret numerical data

  3. Descriptive Statistics • Used to organize and summarize data • Provide an overview of numerical data • Two main components: • Central Tendency • Variance

  4. Central Tendency • Three components to understanding the typical or average score • median • mean • mode

  5. 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

  6. Mean • Arithmetic average of the scores in the distribution

  7. Mode • the most frequent score in the distribution

  8. 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

  9. Inferential Statistics • Used to evaluate the probability that results might be due to chance

  10. 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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