ch. 14 evaluating measurements
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| evaluation of quantitative data | -establishing the reliability and validity of quantitative data obtained by instruments, tests, or measurements (synonyms)-- devices to measure the quantity of an attribute
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| evaluation of quantitative data | ex: height-- rather tall vs 6'2; weight -- kind of chubby vs BMI of 30
**assignment of numbers to measure the differences between Ss possessing varying degrees of an attribute
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| Levels of measurement | -assignment of numbers to quantitative data collected via various measurements that enables analysis
1. nominal
2. ordinal
3. interval
4. ratio
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| Nominal measurement | -use of numbers to classify variables
-attribute only named
-no quantitative meaning
-minimal mathematical treatment possible
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| nominal measurement | ex: gender, race: w=1, b=2, h=3, a=4, marital status, religion, blood type, sleep position, type of analgesic, type of education of RN, answers to true/false or yes/no questions
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| nominal measurement | -lowest level
-involves using numbers simply to categorize attributes
-gender and blood type are typical examples of this
-numbers dont have quantitative meaning (if guys and girls were coded as 1 and 2, the numbers would not have quant. implication
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