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Exam 1-Free Preview Heal 395
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This 2 page Class Notes was uploaded by A Jones on Friday September 9, 2016. The Class Notes belongs to Heal 395 at College of Charleston taught by Hart in Fall 2016. Since its upload, it has received 11 views. For similar materials see Biostatistics in Public Health at College of Charleston.
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Date Created: 09/09/16
9/9/2016 Exam 1 | Evernote Web Exam 1 4 Major Areas of Biostatistics DIPS 1. Descriptive 2. Probability: likelihood of something. 3. Inferential: forming inferences based on data from a sample. 4. Statistical: methods and tests are used to analyze variables.. Types of Data and Experimental Design Categorical Data yes/no, qualitatCNO Nominal: order does NOT matter examples: gender, sex, eye color Either Dichotomous or Multinominal Ordinal order of data matters ***Has to have more than two option..... 2>options Numerical natural order to daNDC Discrete, ratio whole numbers Use for easier interpretation/analysis Continuous, intervalcan take on any value within a particular range ***Proportion = Observations in category/total observation ****To compute a percentage, multiply the proportion by 100% Basics of Experimental Design Experimental unit WHO we are studying Variables Summarizing Data https://www.evernote.com/Home.action#n=0d2f318cc67d4931b22167fe1a313fd8&b=3e793d12ce2948b5aeeb1/702ed6bc73&ses=4&sh=1&sds=5& 9/9/2016 Exam 1 | Evernote Web Statistics and parameters When do we use statistics? When we want to observe a sample When do we use parameters When we want to observe a population Measures of Central Tendency Mean For Discrete and Continuous NOT for Nominal data Is sensitive, so it's shifted by outliers Median Describes the 50th percentile NOT for Nominal data Mode NOT for continuous data Geometric Mode NOT for data sets with Negatives or 0's Used for data that decreases or increases exponentially Measures of Dispersion https://www.evernote.com/Home.action#n=0d2f318cc67d4931b22167fe1a313fd8&b=3e793d12ce2948b5aeeb12b02ed6bc2/7ses=4&sh=1&sds=5&
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