STATISTICAL TECHNIQUES AND TOOLS
CONFIDENCE INTERVALS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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chance variation in choosing a random sample.
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undercoverage.
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some of the subjects did not understand the questions.
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voluntary response.
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Detailed explanation-1: -The margin of error is a measure of the amount of random sampling error in a survey’s results. It is calculated based on the sample size and the level of confidence desired. Therefore, chance variation in choosing a random sample is included in the margin of error.
Detailed explanation-2: -The margin of error in statistics is the degree of error in results received from random sampling surveys. A higher margin of error in statistics indicates less likelihood of relying on the results of a survey or poll, i.e. the confidence on the results will be lower to represent a population.
Detailed explanation-3: -To put it simply, the margin of error means the degree of uncertainty that your survey results might have. The larger the margin of error is, the more likely it is to be further away from the “true figures” for the whole population.