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BEM 314 chapter 15
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- 1Errors in survey research:1. Random sampling error
2. Systematic error / Sample Bias - 2Random sampling error:Statistical Fluctuation that occurs because of chance variation in the elements selected for a sample
- Difference between sample result & census result conducted using identical procedures - 3Systematic Error- "Non-sampling error"
- Error resulting from some imperfect aspect of the research design = causes respondent error; or a mistake in the execution of the research - 4Sample BiasPersistent tendency for sample results to deviate in one direction from the true value of the population parameter.
1. Respondent error
2. Administrative error - 5Respondent errorA category of sample bias resulting from some respondent action or inaction such as non-response or response bias.
-non-response
-response bias - 6Non-response error1. Non-respondents – aren’t contacted or refused to cooperate
2. Refusals – unwilling to partake
3. No contacts – not at home or inaccessible on 1st or 2nd contact - 7Response BiasOccurs when respondents consciously or unconsciously answer questions with a certain slant that misrepresent the truth
- Intentionally or unintentionally - 8Types of reliability1. Stability reliability
2. Representative reliability
3. Equivalence reliability - 91. Stability Reliability(test-retest) relates to whether or not the data collection instrument produces the same results over time.
- 102. Representative Reliabilitywhether or not the instrument produces same result when applied to different subgroups in a population
- 113. Equivalence Reliabilityrelates to whether or not when a lot of different items are used in a questionnaire, they all measure the phenomenon consistently (split-half method).
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- Fichas sobre BEM 314 chapter 15, creado por chelseaklokow el 16/05/2016.
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