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the basics

the basics - Lecture Outline Why do we need statistics...

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The Basics Lecture Outline Why do we need statistics Basic math concepts Statistical terminology Why do we need statistics? Research

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Lecture Outline Why do we need statistics Basic math concepts Statistical terminology Basic math concepts Appendix A under Still Confused on Blackboard Order of operations – Parentheses – Exponents – Multiplication – Division – Addition – Subtraction Appendix A Symbols & notation Make sure you know how to use your calculator Basic algebra – solve for X Rounding Keep as many decimal places as possible until you reach your solution You should know how to store answers in your calculator in order to do this! Round to the 3 rd decimal point • Example 1.2588 1.259 1.2043 1.204
Lecture Outline Why do we need statistics Basic math concepts Statistical terminology Statistical Terminology Main Divisions of Statistics – Descriptive vs. Inferential • Variables – Dependent Variables Operational Definitions Scales of Measurement – Independent Variables • Levels • Hypotheses Main Divisions of Statistics Descriptive statistics: “describing” the data – “First impression” – general trends – Examples: measures of central tendencies; correlation and regression Inferential statistics: draw conclusions from the data (from the “numbers”) – Make inferences from samples back to the population – Examples: Dependent t-test, Chi-Square What Type of Test? One IV 2 Groups One IV > 2 groups > Two IV Nominal Data Ratio/Interval Data Independent t-test Dependent t-test Chi-Square Test of Association Nominal Data One-way ANOVA Interval/Ratio Data Chi-Square Test of Association One-way ANOVA Nominal Data Interval/Ratio Data Chi-Square Test of Association Two-way ANOVA

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Statistical Terminology Main Divisions of Statistics – Descriptive vs. Inferential • Variables – Dependent Variables
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the basics - Lecture Outline Why do we need statistics...

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