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

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Presentation on theme: "Agenda for January 27 th Administrative Items/Announcements Attendance Handout: presentation signup Pictures today! Finish this week’s topic: Research."— Presentation transcript:

1 Agenda for January 27 th 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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