The margin of error used in a confidence interval is found by ________. A)multiplying the standard error and z_α/2 B)multiplying the population standard deviation and the sample size C)dividing the population standard deviation by the sample size D)multiplying the level of confidence and the standard error

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Quizplus · Accepted Answer

The margin of error is calculated by multiplying the standard error with the z-score corresponding to the level of confidence and the standard deviation of the population. The formula used for calculating the margin of error is: Margin of Error = z_α/2 where z is the z-score corresponding to the level of confidence, S is the sample standard deviation, n is the sample size, and α/2 is the level of significance (typically set at 0.05). Therefore, option A is the correct choice.

The Margin of Error Used in a Confidence Interval Is