Which of the following sources of error is included in the margin of error a chance variation in choosing a random sample. b undercoverage. c some of the subjects did not understand the questions. d voluntary response. e all of the above.

Margin of error is calculated as critical value x standard error. Thr standard error, or standard deviation, includes the range of values that deviate both above and below a sample. This standard deviation is the level of errors that come from random sampling. A higher margin of error would indicate that the sample being analyzed has a lower likelihood of accurately representing the population. A smaller margin of error would indicate that the one can have a higher confidence in the sample being an accurate representative of the polulation.

Therefore, a chance variation in selecting a random sample is a critical component of the margin of error. Other options mentioned do affect a survey but cannot be included in the margin of error. Hence, option a. is the correct answer.

bratislava bratislava · Answer 2 · 2022-02-15T12:00:12+01:00

The source of error includes the margin of error and has a chance of variation in picking up the random sample. Hence option A is correct.

Where is the source of error commonly found?

A random sample can be part of the sampling technique that the sample has an equal chance of being selected. The sample is meant be an unbiased presentation of the total population. The margin of error is the amount that is allowed in the case of miscalculation or the change and is a part of miscalculations.

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