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 •Examp le 1.2588 1.259 1.2043
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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 • Operational Definitions
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This note was uploaded on 03/26/2008 for the course STAT 0032 taught by Professor Dicorcia during the Spring '08 term at Tufts.

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

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