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18 download_doc-3.php - L esson 2 I. Data a. Types i....

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Lesson 2 I. Data a. Types i. Qualitative 1. AKA categorical 2. Non-numeric in meaning a. But can be represented by numbers 3. Presence/ absence of a specific characteristic 4. Types a. Nominal i. Categorize characteristics with name only ii. Lowest level of data iii. Example: Gender b. Ordinal i. Give a “class” or order ii. Example: grades iii. 2 nd lowest level of data ii. Quantitative 1. AKA Numerical 2. Data/ Variables we count or measure 3. A # always represents an observation 4. Can always derive a mean that signifies importance 5. Types a. Ratio
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i. Most numerical data b. Interval i. Only temperature 6. Classifications a. Discrete i. Limited to non-negative integers ii. Result of counts b. Continuous i. No gap ii. Any real/ feasible # that the variable is able to have iii. Result of a measurement II. Samples a. Groups of samples i. Non-probabilities 1. Certain populations have 0% chance of being selected over others 2. Results in sampling bias a. Sampling bias i. As the sample gets closer to the population,
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18 download_doc-3.php - L esson 2 I. Data a. Types i....

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