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A number calculated from a random sample that estimates the likely size of the sampling error in an estimate of a population parameter.
The margin of error is added to and subtracted from a point estimate of a population parameter to form a confidence interval for a population parameter, usually with a confidence level of 95%. The margin of error is therefore half of the width of a confidence interval.
Generally a larger sample size will give a smaller margin of error.
The higher the confidence level, the greater the margin of error.
Curriculum achievement objectives references
Statistical investigation: Level 8
Statistical literacy: Level 8
