FORESTRY
AGRICULTURAL STATISTICS AND ECONOMICS
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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: -Margin of error (parameter) = Critical value x Standard deviation for the population. Margin of error (statistic) = Critical value x Standard error of the sample.
Detailed explanation-3: -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-4: -The formula for the margin of error is calculated by multiplying a critical factor (for a certain confidence level) with the population standard deviation. Then the result is divided by the square root of the number of observations in the sample.